INSTALLATION
INSTRUCTIONS
MERIT PLUS® SERIES
36" Indoor / Outdoor Wood Burning Fireplaces
P/N 850,030M REV. B 04/2006
MODEL
MP-36OD
This installation manual will enable you to obtain a safe, efficient and de-
pendableinstallationofyourfireplacesystem.Pleasereadandunderstand
these instructions before beginning your installation.
Do not alter or modify the fireplace or its components under any circum-
stances. Any modification or alteration of the fireplace system, including
but not limited to the fireplace, chimney components and accessories,
may void the warranty, listings and approvals of this system and could
result in an unsafe and potentially dangerous installation.
IMPORTANT! TO ASSURE PROPER ALIGNMENT OF GLASS
DOORS: INSTALL THIS FIREPLACE IN A SQUARE AND PLUMB
CONDITION, USING SHIMS AS NECESSARY AT SIDES AND/OR
BOTTOM.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
VEUILLEZ GARDER CE MANUEL
POUR RÉFÉRENCE FUTURE.
NOTE: This fireplace has been listed and approved for use outdoors or
indoors.
A French manual is available upon request. Order P/N 850,030CF
CAUTION! THIS FIREPLACE IS EQUIPPED TO BE READILY IN-
STALLED OUTDOORS. IF INSTALLED INDOORS, YOU MUST
INSTALL THE COMBUSTION AIR COVER PROVIDED WITH THE
INSTALLATION KIT OR PURCHASE THE OPTIONAL OUTSIDE AIR
KIT GATE OAKG-OD. SEE INSTRUCTIONS INSIDE THIS MANUAL
FOR FURTHER DETAILS.
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 850,030CF.
IMPORTANT! POUR ASSURER L’ALIGNEMENT APPROPRIÉ DES
PORTES DE VERRE : INSTALLEZ CE FOYER SUR UNE SURFACE
PLANE ET METTRE À NIVEAU EN UTILISANT DES CALES AU
BESOIN SUR LES CÔTÉS OU EN DESSOUS.
ATTENTION! CETTE CHEMINÉE A ÉTÉ ÉNUMÉRÉE ET APPROU-
VÉE POUR ÊTRE AISÉMENT INSTALLÉE À L’INTÉRIEUR OU
DEHORS. S’INSTALLÉÀL’INTÉRIEUR, VOUSDEVEZINSTALLER
LA COUVERTURE D’AIR DE COMBUSTION ÉQUIPÉE DE KIT
D’INSTALLATION OU ACHETER LA PORTE EXTÉRIEURE FAC-
ULTATIVE OAKG-OD DE KIT D’AIR. VOIR LES INSTRUCTIONS À
L’INTÉRIEUR DE CE MANUEL POUR D’AUTRES DÉTAILS.
OTL Report No.
116-F-35-2
Note: These fireplace systems are not difficult
to install. However, in the interest of safety, it is
recommendedthattheinstallerbeaqualifiedor
certified “tradesman” familiar with commonly
accepted fireplace installation and safety tech-
niques as well as prevailing local codes.
Vinyl siding is not recommended for use
on the front of the fireplace due to the heat
the unit produces. This can cause the vinyl
siding to deteriorate.
WARNING
If insulation is used, the fireplace
mustnotbeplaceddirectlyagainst
it. Insulation or vapor barriers, if
used, must first be covered with
gypsum board, plywood, particle
board or other material to assure
insulation and vapor barriers
remain in place.
Note: Illustrations shown reflect “typical”
installations with nominal dimensions and
are for design and framing reference only.
Actual installations may vary due to individual
design preferences. However, always maintain
minimum clearances to combustible materials
and do not violate any specific installation
requirements.
INTRODUCTION
General Information
These fireplaces are traditional radiant heat
fireplaces with standard bar grates, optional
Outside Air Kits (required for outdoor installa-
tions) and optional Operable Bi-Fold Stainless
Outdoor Glass Doors and Weather Cover.
These fireplaces have been tested and listed
by OMNI-Test Laboratories, Inc. (Report No.
116-F-35-2) to U.L. 127 (USA) and U.L.C.
S610 (Canada). These units are intended for
indoor and outdoor installations as specified
in this manual.
AVERTISSEMENT
These appliances are approved for installation
indoors or outdoors.
Indoors: These appliances are approved
for installation in residential homes and
otherbuildingsofconventionalconstruction
including commercial, not in manufactured
homes(see Figure 5).
Si un isolant est utilisé, il ne doit
pasvenirencontactaveclefoyer.
L’isolant ou le coupe vapeurs, si
utilisée, doit d’abord être couvert
d’un panneau de gypse, contre-
plaqué, panneaudeparticulesou
d’unautrematérielpours’assurer
que l’isolant et le coupe vapeurs
demeurent en place.
ForinstallationsinCanada,thechimneyclear-
ance to combustibles must be 2 inches and
the Cold Climate Kit must be installed.
Outdoors: Theseappliancesareapprovedfor
installion against an outside wall of a house,
or as a freestanding fireplace on the porch,
patio, or located in the yard (see Figure 6).
The Outdoor Fireplace must be enclosed to
prevent impact damage to the outside of the
fireplace. Build an outside enclosure out of
standard building materials, being careful to
maintain the minimum air clearances speci-
fied in these Installation Instructions. When
installing the fireplace as a freestanding unit
onyourporch,patioorbackyard,itmustalso
beenclosedtopreventimpactdamagetothe
fireplace. However, the enclosure must now
be finished on all four (4) sides. The exterior
oftheenclosuremaybefinishedinatextured
plywood, a wood clapboard siding, brick, or
a cultured stone.
WARNING
Do not pack or fill required air
spaces with insulation or other
material.Nomaterialisallowed
in these areas.
These fireplace systems are designed for in-
stallation in accordance with the National Fire
Protection Standard for chimneys, fireplaces
and solid fuel burning appliances; NFPA 211-
latest edition and in accordance with codes
such as the BOCA Basic/National Codes, the
Standard Mechanical Code and the Uniform
Building Codes.
AVERTISSEMENT
Ne remplissez pas les espaces
libres d’une matière isolante ou
de tout autre type de matériel.
Aucun matériel n’est permis
dans ces espaces vides.
TYPICAL INSTALLATION - INDOORS
Chimney and
Termination
TYPICAL INSTALLATION - OUTDOORS
Termination (FTF8-CTD/CTDT)
Storm Collar
(FSC)
Outdoor fireplace
system less than 15
feet height must be a
Flashing
(Locally
Outside Air Kit installa-
tion is optional unless
mandated by local build-
ing codes.
minimum of 10 feet
Fabricated)
Chimney Section
(FTF8-48)
away from a building or
combustible structure.
If installed closer than
10 feet, the 10 Foot
Rule applies (see Ten
Foot Rule Summary on
Page 15).
* Outside Air Kit (provided)
must be installed in
outdoor installation.
Outside
Combustion
Air Kit
Use Only Non-Combustible Materi-
als From Top Of Spacers Down And
Within 1/2" Min. To Side Frame.
(Optional)
7' 3" Min. (using one 4' section)
Side Frame
Notes:
• Framing is shown as
reference only. It can differ
according to design and
local building codes.
• Fireplace is shown for
illustration purposes only.
It may differ from actual
model.
*Air Inlet
(Provided)
Metal Safety Strips
And Hearth Extension
Required When Installed
On Combustible Floor
Or In Proximity To
Note: Framing and fireplace shown as reference
only. It can differ according to design and local
building codes.
Combustible
Floor/Covering.
Figure 2
Figure 1
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
3
INDOOR INSTALLATIONS - The minimum
installed height of the completed fireplace
system for is 15' 0." The maximum height is
60' 0" (see Table 1).
OUTDOOR INSTALLATIONS
Minimum System Height
Security's FTF8 Pipe
WARNING
Failure to use manufacture
provided parts, variations in
techniques and construction
materialsorpracticesotherthan
those described in this manual
maycreateafirehazardandvoid
the limited warranty.
Vertical Installation
7' 3" ꢀ
15' 0"
25' 0"
OUTDOOR INSTALLATIONS - The minimum
installed height of the completed fireplace
system is 7' 3." The maximum height is 60"
(see Table 2).
One Offsets
Two Offsets
Table 2 - See following Notes
The fireplace and chimney system must be
enclosed when installed in or passing through
alivingareawherecombustiblesorpeoplemay
comeincontactwithit.Thisisimportanttopre-
vent possible personal injury or fire hazard.
ꢀ Notes (Table 2)
• Outdoor fireplace system less than 15 feet
height must be a minimum of 10 feet away
from a building or combustible structure.
The 10 foot rule applies on all cases (see
ten foot rule summary on Page 15).
AVERTISSEMENT
L’échec d’utiliser la fabrication
les parties fournies, les varia-
tions dans les techniques et le
matériel de construction ou les
pratiques autre que ceux-là ont
décritdanscemanuelpeutcréer
un risque d’incendie et un vide
la garantie limitée.
•
The system height may be reduced to a
singlelengthofFTF8-48pipeandtermination
with either the FTF8-CTD or FTF8-CTDT for
a minimum height on a complete system of
7' 3." The fireplace must be installed as a
Freestandingsystemandlocatedaminimum
of 10' away from any building or structure
(refer to Figure 1).
For questions, please call your distributor or
the manufacturer. Special restrictions apply to
the front and facing of the fireplace and nearby
walls (See Pages 20, 21 & 22).
CHIMNEY SYSTEM
•
The minimum height will vary when using
other Firecraft or Lennox Terminations.
Thesefireplacesaredesignedandcodelistedfor
usewithSecurityChimneysFTF8chimneySys-
tem only. Always use Security Chimneys FTF8
chimney components with these fireplaces. Do
not modify or alter these components as this
may cause a potential serious hazard and void
the Warranty.
Whencompletethesefireplacesystemsconsists
of five basic “sub-systems”:
1. The Fireplace
2. The Chimney and Termination
3. The Optional Glass Doors
4. The Optional Outside Air Kits
5. The Optional Weather Cover (for outdoor
installations)
Chase Enclosure
A chase is a vertical box-like structure con-
structedtosurroundthefireplaceandchimney.
Refer to Figure 4 for a typical chase configura-
tion. As with all chimney installations, avoid
overhead obstructions such as trees, power
lines, etc. A chase should be constructed and
insulated just like any outside wall. In a cold
climate, we recommend the base of the chase
should also be insulated between the solid
continuous floor beneath the fireplace and the
chasebottom.Chaseinsulationinacoldclimate
installation is not required for safety.
Chimney Height - Indoor Installations
The total height of your completed fireplace
system from the surface the fireplace rests on
to the chimney top must not exceed 60' and
mustalsomeetminimumheightrequirements.
Refer to the minimum system height chart (see
Table 1).
CLEARANCES AND HEIGHT
REQUIREMENTS
The fireplace may be placed on or near normal
construction materials*. The outside air kit,
firestop spacer and roof flashing (not chase
flashings) may be placed directly on or against
normal construction materials. **
Note: Do not insulate the chase cavity with
blown or fill type insulation materials.
Chimney Height - Outdoor Installations
The total height of your completed fireplace
system from the surface the fireplace rests on
to the chimney top must not exceed 60' and
mustalsomeetminimumheightrequirements.
Refer to the minimum system height chart (see
Table 2).
Note:Localcodesmaynotrequirefirestopping
at the ceiling levels for outside chase installa-
tions. However, it is recommended for safety
and the reduction of heat loss.
A combustible mantel may be installed 12"
above the opening of the fireplace as per NFPA
211-latest edition. In Canada, the minimum is
18" above the fireplace opening.
ASSEMBLY OUTLINE
Before You Start
* In the USA, the chimney and fireplace outer
wrapper require a minimum 1" ꢀ air space
to insulation and construction materials.
Check your inventory list to be sure you have
all the necessary parts supplied in good us-
able condition. Check also for any concealed
damage.
INDOOR INSTALLATIONS
Minimum System Height
Security's FTF8 Pipe
ꢀInCanada,thechimneyandfireplaceouter
wrapper require a minimum 2" air space to
insulation and construction materials.
Checktheoperationofthedamper. Thedamper
is controlled through the use of a control lever
located within the firebox opening at the top
center in front of the firebox lintel (Figure 3).
The control lever snaps into place at either
extreme of its range of motion. When locked
in position all the way to the right, the damper
is open. When locked in position all the way to
the left, the damper is closed.
Vertical Installation
One Offsets
15' 0"
15' 0"
25' 0"
** Construction Materials:
Two Offsets
• Framing Materials • Paneling
• Particle Board
• Dry Wall
• Flooring
• Plywood
Table 1
• Noncombustible Insulating Materials
• Etc.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
4
Whenchoosingalocation,caremustbetaken
to avoid places where flooding or running
water may be a problem.
Indoor Locations - Carefully consider the
position of the fireplace opening with re-
spect to the location of adjacent or nearby
stairwells, bath or kitchen exhaust fans
and/or return air registers for forced air
furnaces/air conditioners that could cause
a smoking fireplace condition if the house
is tightly insulated.
DO NOT place furniture or other items such
as plants or decorative objects within 60” of
the fireplace front face.
Damper
Open
Damper
Closed
Lintel
Combustion Air Actuator
(when installed)
Outdoor Locations - Top View
LIVING SPACE
Indoor Locations - Top View
Figure 3
Chase Enclosure - Indoor Installation
Air Inlet (inlet
Insulate Joists
Same As Ceiling
must be free of
Optional
any obstructions)
Hearth
Hearth
Extension
PATIO
Hearth
Draft Stops
Firestop
Figure 6
Optional
Figure 5
Outside Chase
Restrictions for Outdoor installations:
• Outside Air Kit must be installed and
fully open on the outdoor installation. On
the indoor installation is optional unless
mandated by local building codes.
• Minimum chimney height for the outdoor in-
stallation is 7' 3" (one 4 foot pipe section).
• Only non-combustible materials are al-
lowed on the front face (Front Fireplace
Frame) and around the perimeter within
1-5/8” on the top and 1/2" on the sides
(see Figures 1, 51 & 52).
CTDT
Termination
CAUTION
To ensure that the outside air
kit remains open for an outdoor
installation,thisfireplaceshould
not have a combustion air gate
control installed (OAKG-OD). If
this unit is installed indoors,
you must install the outside
combustionaircoverprovidedor
an optional outside air kit gate
(OAKG-OD) before the fireplace
is framed in place.
Note: Non-
Combustible
Chase
Flashing
Must Be
Used To
Cover
Chase
Opening
Combustible materials may project beyond the
sides of the fireplace opening as long as they
are kept within the shaded areas illustrated in
Figure 7.
Optional
Insulation
In Outside
Walls Of
Chase
CLEARANCES
8'
Level
Minimum clearance to combustibles for the
appliance is as follows: sides and back - 1” (25
mm), floor-0”(0mm), adjacentwall-12”(305
mm), ceiling - 37 1/2” (953 mm).
Solid
ATTENTION
Continuous
Surface
Assurer que les restes extérieurs
dekitd’airouvertspouruneinstal-
lationextérieure,cettecheminée
n’ontpasunecommandedeporte
d’air de combustion a installé
(OAKG-OD). Si cette unité est
installéeàl’intérieur, vousdevez
installer la couverture extérieure
d’air de combustion fournie ou
une porte extérieure facultative
de kit d’air (OAKG-OD) avant
que la cheminée soit encadrée
en place.
Note: Clearance at the nailing tab is 0" (0mm)
Outside
Base
Insulation
(see Figure 25).
(Thermal Barrier)
Figure 4
Note: Adjacent wall considerations are for
an adjacent wall on only a single side. Walls
should not be placed at minimum distance at
both sides of the fireplace.
LOCATION OF FIREPLACE
Carefully select the proper location for heat
circulation, aesthetics, chimney obstructions,
air inlet location and clearance to side wall(s).
With proper pre-planning, a slight adjustment
of a few inches can save considerable time and
expenselaterduringconstructionandassembly.
See Figures 5 & 6 for examples.
When locating the fireplace, consideration
must be given to combustibles and final
finishing. See Figure 5 and confine the final
location of combustible finish materials to
the "Safe Zone."
Frame Surface Not to Be Covered
With Combustible Materials
Wall
Covering
12"
45°
1"
Door
Opening
Outdoor Locations - Carefully consider the
positionofthefireplaceopeningwithrespect
to the location of adjacent or nearby stair-
wells, doors, windows, walk ways and over
hanging trees, patios and wires.
Safe
Zone
12"
Figure 7 Clearances
DONOTpermanentlyplacefurnitureorother
items such as decorative pillows within 60"
of the fireplace front face.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
5
If you plan to raise the fireplace and hearth
extension, build the platform assembly then
position fireplace and hearth extension on
top. Secure the platform to the floor to prevent
possible shifting.
ASSEMBLY STEPS
Outside Air Collar
Note: The following steps represent the normal
sequence of installation. Each installation is
unique, however, and might require a different
sequence.
Right Side
Outside Panel
on Fireplace
WATERPROOFING THE FIREPLACE
Outdoor Installations
1. Position firebox prior to framing or into
prepared framing.
2. (Outdoor Installations) Waterproof the
fireplace. See Waterproofing The Fireplace
on Page 6.
Although the fireplace is designed to drain to
the front most of the water from rain and other
sourcesthatmayentertheheartharea,conden-
sationandunusualconditionsmaycausewater
to collect inside the fireplace bottom.
Four (4) Screws
A
B
3. Install the chimney system.
4. Installanoutsideaircoveroranairgatekit, if
fireplace is being installed indoors (optional
accessory, see Page 23 for ordering infor-
mation). The Airgate kit is required on all
INDOOR installations when an outside air
kit is installed. The Airgate Kit is NOT ap-
proved for use on outdoor installations.
5. Install outside air kit (provided). This kit
is required on ALL outdoor installations
(optional for indoor installations).
6. Plumb gas line if a decorative gas appliance
will be used. (Gas connections should only
be performed by an experienced, licensed/
certified tradesman).
Right Outside
Panel on
Fireplace
To prevent water collection, the builder must
provide a means to drain water from under
the fireplace by building or installing a water
collector of the builder's choice before posi-
tioning the fireplace on its location.
Outside air collar Removed
INDOOR INSTALLATIONS ONLY
Outside Air Cover
If the optional outside air kit is not required
in an indoor installlation, you must install the
outside air cover to close the opening for the
outside air kit (see Figure 8, Photo C).
Outside Air Cover Installed
Right Side
7. Complete the installation, finish wall mate-
rial, surround and hearth extension to your
individual taste.
8. Assemble and attach optional glass door
assembly.
Outside Panel
on Fireplace
Studytheillustrationoftheinstallation,Figures
1 & 2, to get a general idea of each element of
your fireplace system.
WARNING
Required on indoor installations if
C
an outside air kit is NOT installed.
IndoorInstallations-Iftheoptional
outside air kit is not required, the
outsideaircovermustbeinstalled
for safe fireplace operation.
Viewed from right side of fireplace
Figure 8
PRE-INSTALLATION NOTES
The fireplace may be installed directly on a
combustible floor or raised on a platform of an
appropriate height. Do not place fireplace on car-
peting, vinyl or other soft floor coverings. It may,
however,beplacedonflatwood,plywood,particle
board or other hard surfaces. Be sure fireplace
rests on a solid continuous floor or platform with
appropriate framing for support (and for indoor
installation ensure that no cold air can enter the
room from under the fireplace).
Outside Air Kit Gate Installation
(optional kit) Indoor Installations Only
AVERTISSEMENT
TheinstallationoftheAirGate(shutter)isrequired
on all indoor installations to prevent cold air
infiltration when an outside air kit, OAK-OD (duct
& hood), is installed. The Outside Air Kit Gate,
OAKG-OD (air gate & arm), must be purchased
and installed before the fireplace is installed.
Installations d’intérieur - si le kit
extérieur facultatif d’air n’est pas
exigé, la couverture extérieure
d’air est exigent pour l’opération
sûre de cheminée.
The fireplace may be positioned and then the
framing built around it, or the framing may be
constructed and the fireplace positioned into
the opening.
1. Remove the Outside Air Collar located on
the right hand side of the fireplace (retain
the screws). See Figure 8, Photos A & B.
The Outside Air Cover is included in the Instal-
lation Instrctuions package provided with this
fireplace. Follow the steps below:
Usually, no special floor support is needed for
the fireplace, however, to be certain:
2. Install the Outside Air Kit Gate (OAKG-
OD) per the instructions in the kit and the
following instructions using the screws
provided.
a. Remove the Outside air collar located on
the side of the fireplace. Do not discrd the
screws (see Figure 8, Photos A & B).
1. Estimate the total weight of the fireplace
system including chimney and surround
materials such as brick, stone, etc., to be
installed. Shipping weight for the fireplace
may be found on Page 9 (see Product
Reference Information).
2. Measurethesquarefootageofthefloorspace
tobeoccupiedbythesystem,surroundsand
hearth extensions.
a. Assemble the Air Gate Arm to the Air
Gate as shown in Figure 9.
b. With the screws previously removed, install
the cover provided with the installation
instructions kit (see Figure 8, Photo C).
b. Take the Air Gate Assembly and feed the
arm through the round opening (see Figure
10)andthenthroughthesideframeopening
in the front as shown in Figure 11.
3. Note the floor construction, i.e. 2 x 6’s, 2 x
8’s or 2 x 10’s, single or double joists, type
and thickness of floor boards.
4. Use this information and consult your local
building code to determine if you need ad-
ditional support.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
6
4. InstallanOutsideAirKit (withductandhood)
Assemble the Air Gate and Arm as shown.
Air Gate Assembly
per the instructions provided with kit.
Using a screwdriver bend this tab outward, if
necessary, for the arm to clear the opening
a. If the outside air kit is NOT installed, you
must install the Outside Air Cover provided
with the instructions kit.
b.IfanoutsideairkitISinstalled,theOutside
Air Kit Gate must be installed (see Page 23
of ordering information).
The Outside Air Kit Gates are required
on all indoor installations only. They
are not approved for use on oudoor
installations.
Air Gate Arm
Air Gate Assembly
Air Gate Operation Instructions
Firebox
Arm
Front Face
Install the Air Gate Kit per the instructions
provided with kit (see Page 23 for ordering
information).
Side Frame
Opening
Air Gate Arm
Air Gate Kit (purchased separately)
Feed The Arm Through Side Frame Opening
Combustion Air Actuator
When assembled onto appliance, the
notch here must be positioned as shown
Figure 11 - Air Gate Arm in Front
Figure 9- Outside Air Kit Gate
IMPORTANT! IF THE AIR GATE IS INSTALLED
UPSIDE DOWN (WITH THE NOTCH POSI-
TIONED ON THE UPPER HALF) IT WILL NOT
WORK PROPERLY. REFER TO FIGURE 9.
c. Ensure the air gate arm remains attached
to the air gate, secure the Air Gate to the
fireplace,withthescrewsprovided,asshown
in Figures 12 & 13.
Align Air Gate Assembly to Opening
Figure 12 - Position Air Gate
Pull Forward to Open,
Push Back to Close
d.Verifythemechanismisworkingbypulling
to open and pushing to close.
Figure 15
3. Install the Outside Air Collar with the screws
To operate, push the end of the actuator arm
to the left as shown in Figure 15, until it "pops"
free of its "locked" position. Pull the actuator
forward to open the combustion air door, and
push it back to close. To "lock" the combustion
air door closed, ensure the actuator is pushed
all the way back then push the end of the actua-
tors to the right until the step in the actuator
moves behind the appliance front face within
the slotted opening.
removed earlier (see Figure 14).
Right Outside Panel
on Fireplace
Secure Air Gate Assembly 4 Places
Figure 13 - Install Screws
Operate the actuator through several cycles
including the "lock" position. Ensuring proper
operation and freedom of movement. Return
the actuator arm to the locked position.
Reinstall Outside Air Collar
Position the Air Gate Assembly as Shown
Figure 10 - Air Gate Assembly to Fireplace
Figure 14 - Reinstall Connector
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
7
Install as follows:
Note: Secure the duct hood to a vertical post
withtheinletpositioneddownward.Ensurethat
nothing blocks the hood opening. This duct
must never terminate higher than 3 feet below
the fireplace termination (Figure 17).
Outside Air Kit Installation (provided)
Connect the 4" (102 mm) Class 0 air duct
provided, to the collar on the fireplace with the
clamps provided in the kit’s hardware package
(Figure 16).
These appliances are equipped with a com-
bustion air inlet collar so that it is possible to
duct combustion air from the outdoors to the
firebox. To accomplish an outside air hook-
up, use only the Outside Air Kit provided with
these appliances. These kits come complete
with all components necessary in completing
a combustion air vent system.
Route the Class 0 metallic air duct out the back
wall or side wall, up through the ceiling or floor
joists to an outside wall. The air duct’s inlet
should be located above any anticipated
snow level. Check local building codes for any
restrictions. We recommend that the inlet be
at least 4 feet above grade level.
Indoor Installations - An Air Gate Kit must be
installed prior to the installation of the Outside
Air Kit (purchased separately - see Page 23 for
ordering information).
3 Feet
Note: Air inlet ducts must not terminate in
attic space.
OutdoorInstallations-Unitsinstalledoutdoors
are required to have the Outside Air Kit (pro-
vided) installed without the Air Gate Kit. The
optionalAirGateKitisnotapprovedonoutdoor
installations.
CAUTION
Air Inlet
(duct hood)
Avoid installing the air inlet
where the opening could be
blocked by snow, bushes or
other obstacles. The maximum
height for the outside air is 50
feet above the hearth, provid-
ing the air inlet is terminated a
minimum of three (3) feet below
the chimney cap level.
Figure 17
Outside Air Kit (provided)
Duct Hole Framing:
Required on all Outdoor installations
Optional on Indoor installations
Cut or frame a hole through the outside of
the enclosure for the installation of the duct
inlet hood. A 5" (127 mm) diameter hole is
required. Feed the loose end of the flexible
duct through the hole cut for the inlet hood and
attach to the collar on the inlet hood using two
(2) screws. Insert the hood into the opening.
Secure in place with nails driven through the
holesinhoodflange.Sealwithnoncombustible
waterproof silicon type caulking. If additional
duct is needed, use Class 0 metallic air duct
(refer to Figure 16).
Air Duct
Air Inlet
ATTENTION
Évitezd’installerlaprised’airou
l’ouverturepourraitetrebloquee
par la neige, les buissons ou
d’autres obstacles. La hauteur
maximum pour la prise d’air est
de50pi.Audessusdelabasedu
foyeràconditionqu’ellesesitue
à au moins 3 pi. En dessous de
la sortie de la cheminée.
Clamps
Note: Air Inlet
Must Be Free Of
Any Obstructions
Figure 16
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
8
FIREPLACE SPECIFICATIONS - MODEL MP-36OD
OAK-OD Combustion
Air Kit
Product Reference Information
Back Wall of Chase/Enclosure
Including Finishing Materials, if any.
Cat.
No.
Model
Ship.
Weight
Ship.
Volume
H1933 MP-36OD
175 lb.
17.3 cu. ft.
(See Note **)
G
Framing Dimensions
K
Header
A
B1
B2
C
41-1/2"
37-1/2"
54-1/2"
28-3/4"
15-3/8"
70"
1054 mm
A
Rough
Framing Face
953 mm
1384 mm
730 mm
391 mm
1778 mm
889 mm
524 mm
499 mm
1257 mm
203 mm
Inside Chase
(Unfinished Shown)
Outside Chase - Indoor Installations
B1
B2
**Note:WhenFramingWith6”StudsHeaderMustBe17”
(432mm)Higher. UseSecurityChimney’sOR15Offset/Re-
turn Elbow To Recess The Chimney Back 2 1/2” (64mm).
Flat Frame Down To A False Header At (B1). Maintain
Required Clearance To Chimney At All Times.
D
E
A
F
35"
Fireplace Framing
G
H
J
20-5/8"
19-5/8"
49-1/2"
8"
* 1" Air Space to insulation and construction materials on the
back and sides.
Back Wall of Chase/Enclosure
Including Finishing
Optional
Outside
Drainage
Line
Air Kit
Materials if any
K
Including Finising Materials
if any
Combustion
Air Kit - Optional
C
A
*
Notes
G
Due to Lennox' ongoing commitment to quality,
all specifications, ratings and dimensions are
subject to change without notice.
G
H
A
All framing dimensions calculated for 1/2"
dry wall at the fireplace face. If sheathing the
chase or finishing with other thickness materi-
als, calculations will need to be made.
Rough Framing Face
(Unfinished Shown)
Outside Chase
Rough
See Page 10 for Ceiling and Roof Framing
Framing Face
(Unfinished Shown)
Outside Chase
Dimensions
Back Wall of
Chase/Enclosure
Including Finising
Materials
Diagrams & Illustrations Not to Scale
27-1/4”
OAK-OD Combustion
Air Kit
(692 mm)
if any
7-13/16
(198 mm)
20-1/4”
D
(514 mm)
J
F
Appliance
Top Spacer
12-1/2"
OTL Report No. 116-F-35-2
(318 mm)
A
40"
1-1/4"
E
(1016 mm)
(32 mm)
Rough
42-1/2"
(1080 mm)
Framing Face
(Unfinished Shown)
Corner Installation
Top View
Appliance Top Spacer
9-5/8”
(244 mm)
7-1/2”
(191 mm)
9-7/8”
(251 mm)
Combustion
Air Inlet
36"
(914 mm)
37"
(940 mm)
Gas Line
Access
32"
(813 mm)
20-3/16”
(513 mm)
Gas Line
Access
37"
(940 mm)
27-7/8”
(708 mm)
2"
(51 mm)
9-3/16”
9-1/16
17-3/8”
(233 mm)
(230 mm)
(441 mm)
7-3/16”
(183 mm)
12-7/8”
(327 mm)
40"
Junction
Box
20-1/4”
(514 mm)
(1016 mm)
42-1/2"
(1080 mm)
Figure 18
Right Side
Left Side
Front
9
INSTALLING THE FIREPLACE
Step 1. Slide the fireplace into prepared fram-
ing or position fireplace in its final position
and frame later.
Framing Ceiling
Frame the opening for the ceiling as speci-
ficed here.
The fireplace may not be recessed into a
combustible floor. Maintain the floor to hearth
clearance established by the fireplace lower
front face.
B
Note: Faming Dimensions in Canada & USA are different
because installations in USA require 1" Clearance to pipe.
Installations in Canada require 2" Clearance to pipe.
A
Step 2. Insert the provided metal safety strips,
beneaththefireplaceasillustrated(Figures21,
22 & 23). The safety strips should overlap 1/2
min. for continual coverage of the floor.
Ceiling Framing
Framing Dimensions for Ceiling
Inches (millimeters)
Note: Safety strips are not required when fire-
place rests on a noncombustible surface.
Flue Type
A
B
FTF8 Vertical
(USA)
14 1/2"
(368 mm)
14 1/2"
(368 mm)
FTF8 Vertical at 2"
(Canada)
16 1/2"
(419 mm)
16 1/2"
(419 mm)
Top Spacer
Maintain
1" (25 mm)
Air Space
At Back
FTF8 Offset 30°
(USA)
14 1/2"
(368 mm)
25"
(635 mm)
FTF8 Offset 30° at 2"
16 1/2"
27"
And Sides
(Canada)
(419 mm)
(686 mm)
Figure 19
Hearth
Extension
1" (25 mm) Space
Framing Roof
Metal Safety Strip
Floor
Frame the opening for the roof as
specificed here.
Note: Hearth extensions must not interfere with
circulating grillwork
Figure 21
C
Note: Faming Dimensions in Canada & USA are different
because installations in USA require 1" Clearance to pipe.
Installations in Canada require 2" Clearance to pipe.
Maintain
1" (25 mm)
Air Space
At Back
D
Roof Framing
And Sides
Framing Dimensions for Roof
Inches (millimeters)
FTF8 at 1" (USA)
FTF8 at 2" (Canada)
Hearth
Pitch
0/12
C
D*
C
D*
Extension
1" (25 mm) Space
14 1/2"
14 1/2"
16 1/2"
16 1/2"
(368 mm)
(368 mm)
(419 mm) (419 mm)
16 1/2" 19"
(419 mm) (483 mm)
16 1/2" 23 1/2"
(419 mm) (579 mm)
6/12
14 1/2"
(368 mm)
17"
(442 mm)
Metal Safety Strip
Platform
Floor
Note: Hearth extensions must not interfere with
circulating grillwork
12/12
14 1/2"
(368 mm)
21 1/2"
(546 mm)
Figure 22
* Perpendicular to roof ridge
Figure 20
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
10
Note: Install the hearth extension only as il-
For Canadian Installations - A Cold
Climate Kit, FTF8-CCK3-LD, must be
installed in all indoor installations.
lustrated (see Figures 21 & 22).
WARNING
The safety strips should extend from front of
the fireplace at least 1 1/2" and should extend
to be at least flush with the sides. In the event a
wooden support is used to elevate the fireplace
abovethefloor, a“Z”typesafetystripshouldbe
fabricated and used to protect the front surface
ofthewoodsupportaswellasthefloorbeneath
the hearth extension (Figures 23 & 24). The
safety strips should be tacked down to prevent
possible movement.
Under no circumstances can the
fireplacetopspacers(seeFigure
18)beremovedormodified, nor
may you notch the header to fit
around or be installed lower
than the spacers. The header
may be in direct contact with
the top spacers but may not be
supported by them.
Step5. Attachthecoldclimatekit, ModelFTF8-
CCK1-LD, around the chimney collar with the
screws provided (see Figure 26).
Note: CCK1-LD model requires a 6" diameter
Class 0 metallic air duct, acquired locally by
installer.
Note: The “Z” type safety strip is not sup-
plied.
Note: Safety strips are not required when fire-
place rests on a noncombustible surface.
AVERTISSEMENT
Sous aucune circonstance les
espaceurs du dessus du foyer
(voir le schéma 13) ne peuvent
être retirées ou modifiées,
vous ne pouvez pas entaillez le
colombage pour ajuster autour
ou être installé plus bas que les
espaceurs. Le colombage peut
être en contact direct avec les
espaceurs du dessus mais ne
peut être soutenu par eux.
Figure 26
Cold Climate Kit Installation Instructions:
1 ¹⁄₂"
Metal Safety Strips
1. Connect the 6" (152 mm) Class 0 metallic
air duct to the collar on the chimney collar
enclosure with the screws provided in the
hardware kit. See Figure 27.
Figure 23
Step 4. The fireplace should be secured to the
sideframingmembersthroughthenailingtabat
the top and bottom on each side of the fireplace
front face. Use 8d nails(Figure 25).
2. Route the Class 0 metallic air duct out the
back wall or side wall, up through the ceil-
ing or floor joists to an outside wall. The
air duct’s inlet should be located above any
anticipated snow level.
Blocking
Note: If the fireplace is installed against an
inside wall, the Class 0 metallic air duct may
be extended into a ventilated attic space at
least 18" (457 mm) above the attic floor.
Secure the duct hood to a vertical post with
the inlet positioned downward. Ensure that
nothing blocks the hood opening. This air
duct must never terminate higher than the
fireplace chimney.
Metal Safety Strips
Figure 24
Nailing Tab
8d Nail
Step 3. Refer to fireplace drawings and speci-
fications (see Figures 18, 19 & 20) for fram-
ing dimensions and details. Frame appliance
enclosure as illustrated in Figure 18.
Install As Shown With
Opening In Downward
Position Do Not Block
Entrance
Note: The framed depth, 20 5/8" (524 mm)
from a framed wall, must always be measured
from a finished surface. If a wall covering such
as drywall is to be attached to the rear wall,
then the 20 5/8" (524 mm) must be measured
from the drywall surface. It is important that
this dimension be exact.
1/2”
Min.
Note: The nailing tab and the area directly
behind the nailing tab is exempt from the
clearancesdescribedonPage5.Maintainat
least1/2”clearancefromthefireboxwrap-
per to the framing at the closest point of
contact, directly adjacent to the flange.
5 Foot Min. Height
From Outside
Ground Level
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
The header may rest on the top metal spacers,
but must not be notched to fit around them.
Consult all local codes.
Figure 25
Figure 27
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
11
3. Cut or frame a hole through the outside
wall for the installation of the duct inlet
hood. A 6-1/2" (165 mm) diameter hole is
required. Feed the loose end of the flexible
duct through the hole cut for the inlet hood
and attach to the collar on inlet hood using
two (2) screws. Insert the hood into the
opening. Secure in place with nails driven
through the holes in hood flange. Seal with
noncombustible waterproof silicon type
caulking. If additional air duct is needed,
use Class 0 metallic duct.
Step 3. Position appropriate firestop spacer
at ceiling and nail temporarily with two (2) 8d
nails. Use flat firestop spacer, Model F8FS, if
chimneypenetratesceilingvertically.Ifchimney
penetratesceilingat30°angle(offsetchimney),
use30°firestopspacer,ModelF8FS30.Useone
nail on opposite sides to hold firestop spacer in
position.Nailpermanently,usingatleasttwo(2)
more8dnails,afterchimneysectionshavebeen
assembledthroughthefirestopspacerandafter
any necessary adjustments have been made.
Firestopspacermustbesecuredbyatleastfour
(4) 8d nails when completely installed.
CAUTION
Allow minimum 1"* chimney air
space to insulation and building
materials throughout vertical or
offset chimney installation.
ATTENTION
Permettez à minimum 1 pouce*
espace aérien de cheminée à
l’isolation, aux matériaux de
construction et aux membres
encadrants dans toute la verti-
cale ou excentrez l’installation
de cheminée.
Steps 6 - Install Air Gate Kit
Notes:
(Required on All Indoor Instlaltions. When
an Outside Air Kit is installed, see assembly
steps on Page 6).
Indoor Installations: If there is a room above
ceiling level, firestop spacer must be installed
on the bottom side of the ceiling. If an attic is
above ceiling level, firestop spacer must be
installed on top side of ceiling joist (Figures
29 & 30).
Install the Air Gate Kit per the instructions
provided with kit and on Page 6 (see Page 23
for ordering information).
Aminimum1"*airspacemustbereservedfor
all combustible materials extending for any
continuous length surrounding the chimney.
Outdoor Installations: If patio installation
requires that a chimney passes through a roof
or room above, be sure to comply with all local
building codes.
Step 7. Outside Air Kit (provided)
*Note: 2"clearancetocombustiblesrequired
in Canada. 2” déblayage aux combustibles
exigés au Canada.
(Required on All Outdoor Instlaltions)
Install the Outside Air Kit per the instructions
provided with kit and on Page 7.
Room Above
ReferenceFigures19&20 andchartsFraming
DimensionsforCeilingandRoof,whichspecify
minimum ceiling and roof dimensions.
Step 8. Route the Class 0 metallic air duct per
the instructions on Page 8.
Step 9. Cut or frame a hole through the outside
of the enclosure for the installation of the duct
inlet hood per the instructions on Page 8.
Innewconstruction,todeterminechimneycenter
line, use plumb line from roof or ceiling above
fireplace to center of flue collar on fireplace.
Firestop Spacer
For remodeling, plumb to center of flue collar
from ceiling above, drive nail through ceiling
from below to mark position, then mark and
cut to passage from above ceiling (around
nail) (see Figure 28). Then plumb from ceiling
or roof level directly above hole which has just
been completed.
Figure 29
INSTALLING THE CHIMNEY SYSTEM
Step 1. Before continuing, check the operation
of the damper, as described on Page 5, (refer
to Figure 3).
Attic Above
Step 2. Using standard construction framing
techniques,constructopeningforchimneyroute
up through the ceiling(s) and roof or through
an outside chase.
Framing must maintain adequate minimum air
space clearance at all times.
Firestop Spacer
Figure 30
Figure 28
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
12
Note: Assemble one component of chimney at
a time (inner section first, then outer section
last) before proceeding with the next complete
section.
Step4.Note:Chimneysectionsareconstructed
withauniquelockingtabdesign,whichensures
animmediate,tightassemblybetweensections.
Planyourchimneyrequirementscarefullybefore
assemblyaschimneyisdifficulttodisassemble
after installation. If disassembled, the tabs
might become damaged. Be certain tabs are
properly formed to ensure locking tabs engage
properly.
CHIMNEY 30° OFFSET THROUGH
FLOOR OR CEILING
It may be necessary to assemble the chimney
at30°whenpassingthroughthefloororceiling
area. Use the F8FS30 firestop spacer as shown
inFigures31&32.Supportthechimneyatfloor
or ceiling penetration with a FTF8 stabilizer if
distanceofchimneybelowceilingis10'ormore.
Maintain1"*minimumairspacetocombustibles
from chimney sections.
Continue to assemble the chimney up through
framed opening. Assemble just enough to
penetrate the roof flashing openings (Figure
36). Always maintain 1"* minimum air space to
insulation and construction materials. Always
check each chimney joint (inner and outer)
to ensure proper engagement. Check vertical
alignment of chimney so that it projects from
the roof in true vertical position.
The Security Chimney's FTF8 chimney system
is a two piece chimney, which snap together
from the fireplace up. Start with the inner flue
section with the lanced end up, snap lock it in
to the matching collar on top of the fireplace.
At all subsequent joints, the upper flue section
fits into the preceding flue section. Each piece
snaps together by means of locking tabs (9
locking tabs per joint). Check each piece by
pullingupslightlyfromthetoptoensureproper
engagement before installing the next section.
If the flue has been installed correctly, it will not
separate when you test it. Also, the inner flue
joint where each section is joined should be
tight and flat without gaps (Figure 34).
Attic Space
F8FS30
1" Min.
*
Firestop Spacer
Air Space
FTF8-S4 Stabilizer
1" Min.
*
Air Space
10'
Max.
30 Firestop
And Attic Above
Figure 31
1" Min. Air Space
*
Room Above
To Combustibles
Figure 36
F8FS30
1" Min.
*
Firestop Spacer
Air Space
Security's chimney sections do not need to be
screwed together. Additional reinforcement is
notnecessaryexceptincertainoffsetconditions
(refer to Page 16, Figure 47).
1" Min.
*
FTF8-S4 Stabilizer
Air Space
Step 5. The height of vertical chimney pipe
supportedonlybythefireplacemustnotexceed
30'. Chimney heights above 30' must be sup-
ported by a Model FTF8-S4 stabilizer installed
at 30' intervals.
30 Firestop
And Room Above
10'
Max.
Figure 32
Figure 34
For Canada Only
Theouterchimneysectioninstallstheopposite-
way; the lanced end goes down and each new
section goes OVER the outside of the previous
section installed (Figure 35).
Note: The Model FTF8-S4 adds 3" net effective
height to the total chimney system.
When installing the chimney system through
an open attic space, the attic shield assembly-
firestop spacer must be used (Figure 33). This
installation is required only for use in Canada.
Install the Model FTF8-S4 stabilizer by fitting
inner section down into respective section of
proceedingfluepipeandlockingouterstabilizer
section into place over the outer chimney pipe.
Position for proper clearance through framed
openingandnailstrapssecurely(undertension
in “shear”) into place on framing. Use 8d nails.
Attach successive lengths of chimney pipe
directly to stabilizer using same techniques as
described in Step 4 (see Figure 37).
Open Attic Space
Locking
Tabs
(Lances)
*Notes:
Figure 33
• 2" clearance to combustibles required in
Canada.
Note: For Canadian installations, all chimney
installed outside the building must be con-
structed with galvalume on the outer sections
only (Note: galvalume is galvanized). The ap-
propriate model designations are located in the
Figure 35
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
13
Roof Ridge
FTF8-S4 Stabilizer
Figure 37
120°
Note: Do not apply excessive pressure to any
subsequent chimney sections following the
stabilizer when installing. Ensure each subse-
quent chimney section is securely attached by
testing as noted in Step 4.
Figure 39
Figure 41
Step 8. The standard Security FTF8 roof flash-
ing assemblies include a storm collar. Slide
the storm collar over outer chimney, rest on
flashing spacers and align with top surface of
flashing. Insert tab in slot, pull tight and bend
tab back over slot. Seal storm collar to outer
chimney with roof caulking or mastic around
entirecircumferenceofpipe.Alsoaddextraroof
caulking to the tab/slot area to seal completely
againstwaterpenetration(Figure40).Checkall
jointsverycarefullytoensurenowaterintrusion
can take place.
Step 10. Using a FTF8-CTD or FTF8-CTDT
Round Termination:
1. Hold the FTF8-CTD (or CTDP) over top of
last chimney section (Figure 42).
2. Center inner slip section in inner flue pipe-
slip down.
Step 6. Select the proper Security Chimneys
roof flashing based on pitch of roof. Use chart
below for selection:
Roof Pitch
Flat to 6/12
6/12 to 12/12
Model
F8F6
F8F12
Next,slideroofflashingoverextendedchimney
sectionthatpreviouslyhasbeeninstalledabove
the roof opening in Step 4. FTF8 flashings
require flashing spacers. Slide flashing all the
way down until the flashing base rests flat on
the roof (Figure 38). Again, check the vertical
position of the chimney and the 1"* minimum
air space to combustibles.
FTF8-CTD or
FTF8-CTDT
Chimney
Locking Band
Mastic
Termination
Figure 42
3. Center outer locking section over outer flue
pipe. Push down until locking tabs are firmly
engaged.
FTF8 Chimney
Do Not Seal
4. Pull up slightly on CTD to ensure locking
joint has firmly engaged.
Flashing Spacers
FTF8 Flashing
Figure 40
Using a FTF8-CTD, FTF8-CTDT (or CTDTM)
Chase Termination:
Step9.SecurityChimneyslockingbands,Model
FLB, may be required if the chimney extends
too high above the roof flashing. As a general
rule, if the chimney extends more than 6' above
the roof flashing, the use of locking bands is
advisable to strengthen the chimney assembly.
Align the locking band at the chimney joint.
Locking bands wrap around pipe joints equally
covering the joints of both pipe sections. Use
the nut provided and TIGHTEN snugly. Do not
overtighten as this might damage the chimney
section (refer to Figure 40).
Refer to specific installation instructions
(750,014M) included with the FTF8-CTDT (or
750,205MforFTF8-CTDTM)chasetermination
for clearance and installation details.
Using a FTF8-CT1 or FTF8-CT1P Chase
Termination:
Refer to specific installation instructions
(750,015M) included with FTF8-CT1 chase
terminations for clearance and installation
details.
Figure 38
Note: Do not caulk or seal the ventilating open-
ings or seal the flashing at the chimney.
Step 7. Secure flashing by nailing along the
perimeter into roof using 8d nails. If shingled
roof, slide upper end and sides of roof flash-
ing under shingles (trim if necessary), seal the
top and both sides of the flashing to the roof
with roof caulking. Cover nail heads with roof
caulking (Figure 39).
Using a FTF8-CT2 Chase Termination:
Refer to specific installation instructions
(750,016M) included with FTF8-CT2 chase
terminations for clearance and installation
details.
Note: If chimney extends more than 8' above
roofsurface, guywiresarealsorecommended.
Use three (3) guy wires, attach to locking
band assembly, extend and secure to roof in a
triangular pattern (see Figure 41). Guy wires
are not supplied by the manufacturer.
Using a FTF8-CTT Chase Termination:
Refer to specific installation instructions
(750,077M) included with FTF8-CTT chase
terminations for clearance and installation
details.
*Note: 2" clearance to combustibles required
in Canada.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
14
To determine the number of chimney sections
and chimney components required, follow
these steps:
Less Than 10'
2' Min.
1.Determinetotalverticalheightofthefireplace
installation.Thisdimensionisthedistancefrom
the surface the fireplace sets on to the point
where smoke exits from the termination.
3'
Min
10'
3'
Min
2. Determine the number of chimney compo-
nents required, except chimney sections. This
wouldincludefirestopspacers, stabilizers, roof
flashing, etc.
3. The effective heights of the components
are:
Figure 43
The Fireplace
=
=
=
=
=
=
=
=
=
36 1/4"
10 1/4"
16 1/4"
341/4"
Note: It is recommended that all exterior ex-
posed metal fireplace components; such as
terminations, flashings, storm collars and/or
flue be painted with a premium quality, high
temperature, rust preventative paint designed
for metal. This is especially important when
installations are made in abnormally adverse
or corrosive environments; such as near lakes,
oceans or in areas with consistently high
humidity conditions. Consult the paint manu-
facturers instructions for proper preparation
and application.
MULTIPLE TERMINATIONS
FTF8-12
If more than one termination is located in the
same chase or within the same general prox-
imity, we suggest they should be separated
in distance at least 24" horizontally from flue
center to flue center and stacked or staggered
verticallyatleast18"apart,fromthetermination
of one smoke exit to the termination of another
smoke exit (Figure 44).
FTF8-18
FTF8-36
FTF8-48
46 1/4"
4"
FTF8-CTD Termination
FTF8-CT1 Termination
FTF8-CT2 Termination
FTF8-CTDT Termination
12" to 18"
15" to 23"
12" to 18"
CTD
TEN FOOT RULE SUMMARY
18"
FTF8-CTDTM Termination = 4"
FTF8-S4 Stabilizer * 3"*
=
The minimum chimney height above the roof
and/or to adjacent walls and buildings is speci-
fied by all major building codes.
18"
CTDT
* Required for every 30' of vertical chimney
and/or 10' of offset chimney.
CTDT
If the horizontal distance from the peak of the
roofislessthen10',thetopofthechimneymust
be at least 2' above the peak of the roof.
4.Determineamountofchimneyheightrequired
by subtracting total combined height of all pre-
selected components (fireplace and chimney
components from total desired height).
24"
24"
Figure 44
If the horizontal distance from the chimney
edge to the peak of the roof is more than 10' a
chimney height reference point is established
on the roof surface 10' horizontally from the
chimney edge. The top of the chimney must
be at least 2' above this reference point. In all
cases,thechimneycannotbelessthen3'above
the roof at the edge of the chimney.
ReferenceVerticalElevationChartanddetermine
the number of chimney sections (quantity and
length) required.
This suggestion is provided in the interest of
better operation. If the terminations are located
too close to each other, smoke may migrate
from one flue into the other.
SPECIAL OFFSET INSTRUCTIONS
FTF8 CHIMNEY COMPONENT
CALCULATIONS
To clear any overhead obstructions, you may
offset your chimney system using Security
Chimneys 30° offset and return elbows. Use
two elbows - an offset elbow to initiate the
offset and a return elbow to terminate it. A
30° offset elbow, angling in any direction, may
be the first component used off the top of the
fireplace flue collar.
The 2' in 10' rule is necessary in the interest
of safety but does not ensure smoke-free op-
eration. Trees, buildings, adjoining roof lines,
adverse wind conditions, etc., may require a
taller chimney should the fireplace not draft
properly (refer to Figure 43).
The minimum installed height of the completed
fireplace system is 15' 0" for indoor installa-
tions and 7' 3" for outdoor installations. The
maximum height is 60' 0."
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
15
The offset and return elbows may be attached
together, or a section or sections of chimney
may be used between, but do not exceed 20' in
total length between elbows. If sections of pipe
exceed10'betweenelbows,achimneystabilizer
must be used at the midpoint (Figure 45). The
stabilizer support straps must be attached
under tension (in shear) to structural framing
members above. When two sets of elbows
are used, the maximum combined length of
chimney used between elbows cannot exceed
20' (Figure 46). Example: If C1 = 10' then C2
cannot exceed 10'.
FTF8 Vertical Elevation Chart
FTF8 Vertical Elevation Chart
11" to 380 1/2"
386 1/2" to 744"
Inches Feet/Inches 12" 18" 36" 48"
Inches Feet/Inches 12" 18" 36" 48"
386 ¹⁄₂
390 ³⁄₄
396 ³⁄₄
404 ¹⁄₂
414 ³⁄₄
416 ¹⁄₂
420 ³⁄₄
426 ³⁄₄
432 ³⁄₄
437
32 2 ¹⁄₂
32 6 ³⁄₄
33 0 ³⁄₄
33 8 ¹⁄₂
34 6 ³⁄₄
34 8 ¹⁄₂
35 0 ³⁄₄
35 6 ³⁄₄
36 0 ³⁄₄
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
8
8
8
8
8
9
8
9
9
9
9
9
9
10
9
11
17
0
1
1
2
2
3
4
4
5
5
6
6
7
8
8
9
9
9
11
5
9 ¹⁄₄
3 ¹⁄₄
11
11
3 ¹⁄₄
9 ¹⁄₄
3 ¹⁄₄
7 ¹⁄₄
1 ¹⁄₄
9 ¹⁄₄
9 ¹⁄₄
1 ¹⁄₄
6 ¹⁄₂
1 ¹⁄₄
5 ¹⁄₂
11 ¹⁄₂
1
0
2
1
0
0
0
1
0
2
1
0
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
2
1
0
1
0
0
1
0
1
0
1
0
0
1
0
1
0
1
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
1
0
1
0
0
0
1
0
0
0
0
0
1
0
1
0
0
0
0
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
1
1
0
1
0
0
0
0
0
0
1
0
1
1
1
1
1
2
1
2
2
2
2
2
2
3
2
3
3
3
3
3
3
4
3
4
4
4
4
4
4
5
4
5
5
5
5
5
5
6
5
6
6
6
6
6
6
7
6
7
7
7
7
7
7
8
7
8
21 ¹⁄₄
27 ¹⁄₄
35
47
51 ¹⁄₄
57 ¹⁄₄
63 ¹⁄₄
67 ¹⁄₄
73 ¹⁄₄
81 ¹⁄₄
93 ¹⁄₄
97 ¹⁄₄
102 ¹⁄₂
109 ¹⁄₄
113 ¹⁄₂
119 ¹⁄₂
127 ¹⁄₄
137 ¹⁄₂
139 ¹⁄₄
143 ¹⁄₂
149 ¹⁄₂
155 ¹⁄₂
159 ³⁄₄
165 ³⁄₄
173 ¹⁄₂
183 ³⁄₄
185 ¹⁄₂
189 ³⁄₄
195 ³⁄₄
201 ³⁄₄
206
36
5
443
36 11
37 6 ³⁄₄
If an offset exceeds 6' in length, each chimney
joint beyond the first 6' of offset to the return
elbow, must be secured by a No. 8 x 1/2" sheet
metal screw located at the underside of the
joint (Figure 47).
450 ³⁄₄
461
462 ³⁄₄
466 ³⁄₄
472
478 ³⁄₄
483
38
5
38 6 ³⁄₄
38 10 ³⁄₄
³⁄₄ 39 4³⁄₄
39 10 ³⁄₄
10
10
10
10
10
10
11
10
11
11
11
11
11
11
12
11
12
12
12
12
12
12
13
12
13
13
13
13
13
13
14
13
14
14
14
14
14
14
15
14
15
15
15
15
15
15
16
15
40
40
3
9
489
A 1/8" diameter hole must be drilled in the
chimney joint using a 1/8 " diameter drill. The
hole should be drilled in center of joint overlap
(Figure 48). Be sure to drill only through the
outer chimney casting. Do not puncture the
inner flue.
10 7 ¹⁄₄
11 5 ¹⁄₂
11 7 ¹⁄₄
11 11 ¹⁄₂
12 5 ¹⁄₂
12 11 ¹⁄₂
13 3 ³⁄₄
13 9 ³⁄₄
14 5 ¹⁄₂
15 3 ³⁄₄
15 5 ¹⁄₂
15 9 ³⁄₄
16 3 ³⁄₄
16 9 ³⁄₄
496 ³⁄₄
507
508 ³⁄₄
513
41 4 ³⁄₄
42
42 4 ³⁄₄
3
42
43
43
9
3
9
519
525
529 ¹⁄₄
535 ¹⁄₄
543
553 ¹⁄₄
555
44 1 ¹⁄₄
44 7 ¹⁄₄
Maximum offset of chimney system is 30°.
Two offsets must not be assembled to form
a 60° offset. However, two sets of offset and
return elbows may be used on a single flue
system, provided the total height of the system
exceeds 25'.
45
46 1 ¹⁄₄
46
3
3
559 ¹⁄₄
565 ¹⁄₄
571 ¹⁄₄
575 ¹⁄₂
581 ¹⁄₂
589 ¹⁄₄
599 ¹⁄₂
601 ¹⁄₄
605 ¹⁄₂
611 ¹⁄₂
617 ¹⁄₂
621 ¹⁄₂
627 ¹⁄₂
635 ¹⁄₂
645 ¹⁄₂
647 ¹⁄₂
651 ¹⁄₂
657 ¹⁄₂
663 ¹⁄₂
667 ³⁄₄
673 ³⁄₄
681 ¹⁄₂
691 ³⁄₄
693 ¹⁄₂
697 ³⁄₄
703 ³⁄₄
709 ³⁄₄
714
46 7 ¹⁄₄
47 1 ¹⁄₄
47 5 ¹⁄₄
47 11 ¹⁄₂
48 5 ¹⁄₂
49 1 ¹⁄₄
49 11 ¹⁄₂
50 1 ¹⁄₄
50 5 ¹⁄₂
51 11 ¹⁄₂
51 5 ¹⁄₂
51 9 ¹⁄₂
52 3 ¹⁄₂
52 11 ¹⁄₂
53 9 ¹⁄₂
53 11 ¹⁄₂
54 3 ¹⁄₂
54 9 ¹⁄₂
55 3 ¹⁄₂
55 7 ³⁄₄
56 1 ³⁄₄
56 9 ¹⁄₂
57 7 ³⁄₄
57 9 ¹⁄₂
58 1 ³⁄₄
58 7 ³⁄₄
59 1 ³⁄₄
17
17
2
8
212
219 ³⁄₄
230
231 ³⁄₄
236
18 3 ³⁄₄
19
19 3 ³⁄₄
Return elbow support straps must be securely
attached under tension (in shear) to structural
framing members above. Do not substitute a
FTF8-30 offset elbow in place of a FTF8-E30
return elbow.
2
19
20
20
21
21
22
23
23
23
24
8
2
8
0
6
2
0
2
6
0
242
248
252
258
266
276
278
282
OFFSET CALCULATIONS
Step 1. Use the Offset Chart (Table 4) to deter-
mineamountofhorizontaloffset(A)andheight
(B) for various chimney section assemblies.
288
294 ³⁄₄
298 ¹⁄₄
304 ¹⁄₄
312
322 ¹⁄₄
324
328 ¹⁄₄
334 ¹⁄₄
340 ¹⁄₄
344 ¹⁄₂
350 ¹⁄₂
358 ¹⁄₄
368 ¹⁄₂
370 ¹⁄₄
374 ¹⁄₂
380 ¹⁄₂
24 6 ³⁄₄
24 10 ¹⁄₄
25 4 ¹⁄₄
26
26 10 ¹⁄₄
27
27 4 ¹⁄₄
27 10 ¹⁄₄
28 4 ¹⁄₄
28 8 ¹⁄₂
29 2 ¹⁄₂
29 10 ¹⁄₄
30 8 ¹⁄₂
30 10 ¹⁄₄
31 2 ¹⁄₂
31 8 ¹⁄₂
Step 2. Use “Height of Chimney Only” column
in The Vertical Elevation Chart to determine
combinations of chimney used above return
elbow to achieve desired heights. Reference
Components Effective Height Chart in vertical
elevation chart section.
0
0
59
60
6
0
720
Step3.UseElevationChartasjobestimatoronly.
Add necessary firestop spacers and stabilizers
as required. Firestop spacers must be used as
shown in Figures 31 & 32 and stabilizers as
shown in Figure 37.
727 ³⁄₄
738
739 ³⁄₄
744
60 7 ³⁄₄
61
61 7 ³⁄₄
62
6
0
Table 3a
Table 3b
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
16
A1
INSTALLING OFFSETS
First, review the Offset Elevation Chart and
Figure 49 for reference.
Return
Elbow
Joints
20'
Max.
t
Step 1. Determine the offset distance where
chimney is to pass through the first
ceiling-dimension “A.” To find this
point on your ceiling, first determine
the center point for a vertical chimney
following the instructions for vertical
installation.
A
'
d
6
e
Chimney
Section
r
t
s
i
u
a
q
P
t
e
B1
4'
R
n
i
s
o
J
w
e
r
y
Stabilizer
r
c
e
S
v
E
t
e
s
n
f
I
f
d
O
e
f
No. 8 x 1/2" SMS
r
10' Max.
o
i
'
u
6'
6
q
e
t
s
R
r
i
s
s
F
w
r
Measure height to the ceiling from the
top of fireplace-dimension “B.” Use the
appropriateOffsetElevationCharttofind
dimension “A.” Mark point where you
will drive your nail to show the center
point for your offset ceiling cut.
e
o
r
Offset
Elbow
F
c
S
t
o
N
n
i
o
J
Figure 47
Step 2. Proceed by using the Straight Up In-
stallation Instructions for cutting and
framing ceiling and roof openings.
Figure 45
Note: See Framing and Dimension Chart for
the sizes of the ceiling and roof openings. The
size of the roof opening varies with the degree
of pitch of the roof.
A2
Underside Of Chimney
C2
B2
Offset Elbow Assembly
Figure 48
A1
Offset elbows install the same as chimney
sections. First, snap the inner section INTO the
preceding inner section of flue. Check connec-
tion by pulling up slightly to ensure a tight fit.
Next, the outer sections snap lock OVER the
preceding outer section of chimney. Again,
check outer section by pulling up slightly to
ensure proper connection is made.
FTF8-E30 Return Elbow*
B1
C1
Chimney Section (S)
B
FTF8-30 Offset Elbow*
Return Elbow Assembly
A
Return elbows install the same way as round
terminations and stabilizers:
A2
Step 1. Hold return elbow over top of last
chimney section.
Step 2. Center inner slip section into inner flue
pipe-slip down.
C2
B2
Step 3. Center outer-locking section over outer
chimney pipe. Push down until locking
joint has firmly engaged.
A1
Step 4. Pullupslightlyonreturnelbowtoensure
locking joint has firmly engaged.
Step 5. Secure support straps to framing
members by nailing under tension in
sheer (Figure 50).
*Part of Offset/Return Package Model FTF8-ES30
B1
Figure 49
C1
Figure 46
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
17
Offset Elevation Chart
A
B
FTF8-ES30
Number of FTF8 Chimney Sections
Offset
Height Offset/Return FTF8-S4
(Inches) (Inches)
Elbow
Stabilizer
12"
18"
36"
48"
4
9
12
15 ³⁄₄
24 ¹⁄₂
29 ³⁄₄
33 ¹⁄₂
38 ¹⁄₂
43 ³⁄₄
45 ¹⁄₄
47 ¹⁄₂
52 ¹⁄₂
54 ¹⁄₄
55 ³⁄₄
57 ³⁄₄
59 ¹⁄₄
63
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
1
0
2
1
0
0
2
1
1
0
0
0
2
1
1
0
0
0
2
1
1
0
0
0
2
1
0
1
0
1
2
0
1
0
2
0
1
0
0
1
1
0
0
0
0
1
0
1
2
0
1
2
0
0
3
1
0
0
1
1
2
0
1
4
0
0
3
1
0
0
0
1
2
0
1
1
0
1
0
0
1
2
0
0
0
1
1
0
0
0
0
0
0
1
0
0
1
0
0
1
1
0
1
0
1
2
1
0
2
1
1
2
2
1
0
2
2
0
2
0
3
3
3
1
3
3
0
4
0
4
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
1
0
0
0
0
0
1
0
0
0
1
2
0
0
2
0
2
0
0
0
2
0
0
3
0
3
0
3
Return
Elbow
14 ¹⁄₄
17 ¹⁄₄
20 ¹⁄₄
21
22 ¹⁄₄
25 ¹⁄₄
26 ¹⁄₄
27
Figure 50
Note: The return elbow assembly performs the
samefunctionasastabilizer.Considerthiswhen
determining the need for a stabilizer.
Note: Do not apply excessive pressure to any
subsequent chimney section following return
elbow assembly when installing. Ensure that
each subsequent chimney section is securely
attached by testing as noted above.
28 ¹⁄₄
29 ¹⁄₄
31 ¹⁄₄
32 ¹⁄₄
34 ¹⁄₄
35 ¹⁄₄
37 ¹⁄₄
38 ¹⁄₄
39 ¹⁄₄
41 ¹⁄₂
43 ¹⁄₄
44 ¹⁄₄
45 ¹⁄₄
46 ¹⁄₄
48 ¹⁄₄
49 ¹⁄₄
50 ¹⁄₄
51 ¹⁄₄
54 ¹⁄₄
55 ¹⁄₄
64 ¹⁄₂
68 ¹⁄₄
69 ³⁄₄
73 ¹⁄₄
75
Gas Line Connection
Install a 1/2" gas supply line through fireplace
wallforconnectiontoadecorativegasappliance
inside the firebox. Outside, the gas supply line
connects to a gas shut-off valve recessed flush
into the wall or floor. The valve should be con-
trolled by a removable valve key for safety.
77
80 ¹⁄₂
83 ³⁄₄
85 ¹⁄₄
87 ¹⁄₂
89
Always plumb gas line installation per local
codes. Check all connections with a gas leak
detection solution for leaks (which will bubble
if present). Never test any gas line connection
with a match or open flame.
91 ¹⁄₂
94 ¹⁄₄
95 ³⁄₄
97 ³⁄₄
103
104 ¹⁄₂
56 ¹⁄₂ 106 ¹⁄₂
This provision is intended for connection to
a decorative gas appliance incorporating an
automatic shut-off device and complying with
the Standard for Decorative Gas Appliances for
installation in vented fireplaces, ANSI Z21.60
(1991) or American Gas Association draft re-
quirementsforGas-FiredLogLightersforWood
Burning Fireplaces, Draft No. 4 dated August,
1993. Install in accordance with the National
Fuel Gas Code, ANSI Z223.1. This complies
with the revised U.L. 127 standard.
58 ¹⁄₄
61 ³⁄₄
64 ³⁄₄
67
68 ³⁄₄ 128
70
109 ³⁄₄
116
121 ¹⁄₄
124 ³⁄₄
130
73
135 ¹⁄₄
138 ¹⁄₄
145 ¹⁄₂
147 ¹⁄₄
150 ³⁄₄
74 ³⁄₄
79
80
82
82 ¹⁄₄ 152
Table 4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
18
If you’re installing a gas line, connect it before
the fireplace is framed and enclosed in the
finished wall. The gas knockout is determined
by the indentation located at the bottom and
slightly off center in the side refractories. THE
KNOCKOUT IS ALWAYS REMOVED FROM
INSIDE THE FIREPLACE. DO NOT REMOVE
THE KNOCKOUT UNLESS YOU ARE INSTALL-
ING A GAS LINE. If removal is attempted from
the outer wrapper, side refractory damage
may occur. With a medium-sized hammer,
lightly tap the surface of the indentation. The
refractory material is very thin in this area
and is easily removed. Once a small hole has
been made, continue tapping until you have
reached sufficient diameter for the gas line to
fit through. The entire knockout does not have
to be removed. Remove insulation in the gas
line channel.
Vent Free Appliances
WARNING
This unit has been tested and approved to
ANSI/IAS/AGA Z21.11.2 for use with unvented
gas appliances for INDOOR INSTALLATIONS
ONLY and complies with the standard for Fac-
tory-Built fireplaces, UL 127, when installed
with unvented gas log sets.
Unvented Gas Log Sets are not
approved for use with fireplaces
installed outdoors. The materials
and components will deteriorate
prematurely if installed outside.
Refer to the log manufacturer’s
literature for limitations and
exceptions.
Special instructions with regards to mantel
installations must be taken into consideration
when installing such appliances.
The unit has been tested for use with any
unvented log sets having a maximum rating of
26,000 BTU in Indoor installations only. The
minimum mantel configuration for these log
sets are outlined in Figure 52.
AVERTISSEMENT
Les ensembles de bûches à gaz
sans conduit d’évacuation ne sont
pas approuves pour l’usage avec
des foyers installes a l’exterieur.
Lesmateriauxetlescomposantes
sedeteriorerontprematurementsi
installees a l’exterieur. Referez-
vous a la litterature du fabricant
des buches pour les limites et les
exceptions.
Log sets with 40,000 BTU may be installed
provided that no combustible mantel projec-
tions are placed lower than 18 inches from the
fireplace opening.
IMPORTANT: REPACK INSULATION MATE-
RIAL IN SQUARE HOLE AROUND GAS LINE,
INTERIOR AND EXTERIOR OF FIREPLACE,
TO SEAL.
These fireplaces have been marked with a
maximum rating of 26,000 BTU to assure
that homeowners do not exceed the allowable
limits for all allowed installations of mantels.
That limit may be increased to 40,000 BTU,
provided that the mantel installed complies
with the 18-inch limitation and a copy of these
instructions are available.
Glass Doors
If glass doors are to be installed on these
fireplaces, refer to specific installation instruc-
tions packed with the glass doors. Use only
the doors that are listed for use with these
fireplaces. Use of other non-listed glass door
on these fireplaces may constitute a potential
fire hazard and is not recommended.
CAUTION
Plumbing connections should
only be performed by a quali-
fied, licensed plumber. Main
gas supply must be off when
plumbing gas line to fireplace
or performing service.
IMPORTANT
Allowminimum1"*chimneyair
space to combustible framing
members throughout vertical or
offset chimney installation.
CAUTION
Certain glass doors overlap the
blackmetalfacingofthefireplace.
IFthefireplacehasbeenfacedwith
noncombustible materials, there
might not be sufficient clearance
to install the glass doors of your
choice.Ensureadequateclearance
ismaintainedatalltimessoasnot
tointerferewiththeinstallationand
operation of glass doors.
ATTENTION
Les raccordements de tuy-
auterie devraient seulement
etre effectues par un plombier
qualifie et autorise. La valve
d’alimentation de gaz princi-
pale doit etre fermee lors de
l’installation ou de l’entretien
de ce foyer.
ATTENTION
Permettez1minimal”*l’espace
aérien de cheminée aux mem-
bres encadrants combustibles
partout dans vertical ou à
l’installation de cheminée de
rejeton.
*Note: In Canada, a 2” clearance to com-
bustibles is required.
* Note : Au Canada, po. de jeu 2 aux com-
bustibles est exigé.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
19
In Canada, the minimum height for a combus-
tiblemantelis18"(457mm)abovethefireplace
opening. Figure 51 shows typical Canadian
installations. Combustible mantels and trim
maybeinstalled12"abovethefireplaceopening
as per NFPA 211-latest edition and Figure 52.
If a mantel is of a noncombustible material,
it is exempt from these requirements as long
as it does not interfere with the installation or
operation of glass doors.
ATTENTION
WARNING
Certaines portes de verre recou-
vrent le revêtement noir en métal
du foyer. SI la façade du foyer a
étérecouverteavecdesmatériaux
non-combustibles, il se pourrait
qu’il n’y ait pas suffisament de
dégagement pour installer les
portes de verre de votre choix.
Assurez d’avoir un dégagmet suf-
fisant à tout moment afin de ne
pasinterféreravecl’installationet
l’opération des portes de verre.
Only non-combustible materials
are allowed on front face (front
fireplace frame) and around the
perimeter within 1-5/8" minimum
on top and 1/2" on sides.
*Note: 2" clearance to combustibles required
in Canada.
AVERTISSEMENT
Note: Do not place any combustible materials
on the fireplace face.
Seulement on permet des matéri-
auxnon-combustiblessurlevisage
avant (armature avant de chemi-
née)etautourdupérimètreàmoins
de 1-5/8 pouces sur le dessus et
de pouce de 1/2 des côtés.
Finished
Wall
COLD CLIMATE INSULATION
8" Max.
(203mm)
Combustible
Mantel
If you live in a cold climate, it is especially
importanttosealallcracksaroundthefireplace
opening with noncombustible material and
wherever cold air could enter the room. Sur-
rounding materials must be caulked where it
meets the black metal facing of the fireplace to
avoid cold air intrusion. Use noncombustible
caulkingmaterialonlyonfireplacefacingtoseal.
Also,theoutsideairinletductshouldbewrapped
with noncombustible insulation to minimize
the formation of condensation. Do not place
insulationmaterialsontopoffireplaceoragainst
chimney sections. If gas logs are installed, the
gas line holes and other openings should be
caulked with high temperature caulk or stuffed
with unfaced fiberglass insulation.
Header
Top Spacer
Hearth Extensions and Wall Shields
on Appliance
❂
1-5/8" Min.
A hearth extension must be installed with
all fireplaces. It is to protect the combustible
floor in front of the fireplace from both radiant
heat and sparks. The hearth extension must
extend 8" beyond both sides of the fireplace
opening and 16" beyond the front (see Figure
53). Use a hearth extension constructed of a
durable noncombustible material having an
equalorbetter(lowerkvalue)insulatingvalueof
k=.84BTUIN/FT2HR°Forathermalresistance
that equals or exceeds r = 1.19 HR °F FT2/BTU
IN. With these values, determine the minimum
thickness/material required using the formula
and Table 5 on Page 21.
18" Max.
(457mm)
Fireplace
Opening
❂
The shaded gray area showing 1-5/8" Min.
indicates non-combustible materal is required.
Figure 51 - Canadian Installation
Note: A 1"* air space must be preserved for all
insulation and construction materials extend-
ing for any continuous length adjacent to the
chimney.
12"
Finished
Wall
Max.
Note: Any noncombustible material having
a thickness of 1" whose k value is less than
.84 or whose r value is more than 1.19 is ac-
ceptable.
Combustible
Mantel
Itisespeciallyimportanttoinsulatebetweenthe
studs of an outside chase cavity and under the
floor if the floor is above ground level. Do not
place insulation directly against the fireplace
or chimney system.
and Trim
1 1/2"
Header
❂
If the fireplace is installed on a combustible
floor, use the metal safety strips (provided)
on the floor extending half under the fireplace
and half under the hearth extension (refer to
Figures 21 & 22).
1-5/8" Min.
Spacer
12"*
Min.
FIREPLACE FINISHES
Mantels and Trim
9-5/8"*
Min.
Itissometimesbesttoframeyourfireplaceafter
it is positioned and the chimney is installed.
Frameenclosureforchimneyandfireplacewith
2 x 4’s (or heavier) lumber.
A wall shield is required where a continuous
perpendicular side wall is within 12" of the
fireplace opening (Figure 53). Use a 24" W x
30"Hx1/2"wallshieldconstructedofadurable,
noncombustible material having an equal or
better (lower k value) insulating value than
k = .54 BTU IN/FT2 HR °F. At no time may a
perpendicular side wall be located closer than
7" from the fireplace opening.
Fireplace
Opening
*Both Of These Dimensions Must Be At Least 18”
When An Unvented Gas Log Set Rated At 26,000
BTU Or Higher Is Used. (Maximum 40,000 BTU).
Note: The header may touch but not rest its
weight on the two (2) metal top spacers on top
of the unit. The header must not be notched to
fit around the spacers.
❂
The shaded gray area showing 1-5/8" Min.
indicates non-combustible materal is required.
These fireplaces may sit directly on a com-
bustible surface. A 1"* air space is required
between insulation and building materials
and the chimney. A 1" air space is required
between combustible framing and fireplace
outer wrapper.
Figure 52 - Typical Installation
If fireplace is installed diagonally across a 90°
corner; no wall shields are required.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
20
Wall Shield Required
Where Less Than 12"
Hearth Extension Dimensions
24"
A
B
C
D
16"
30"
8"
30"
46"
C
C
B
D
Note: To convert inches to millimeters divide by .03937.
C
A
B
D
Figure 53
C
A
Methods of Determining Hearth Extension and Wall Shield
Listed Material
Equivalents - To determine the thickness required for the alternate
material when either the "k" value or "r" value is known, use either the
k formula or r formula.
k (per inch) r (per inch)
Listed Min.Thickness
Listed Material
.84
1.19
rL
1"
KL
TL
Example: If Micore 160 is to be used for the hearth extension fireplace,
how thick must this material be?
** Approved Alternate Materials for Floor/Hearth Protection
AlternativeMaterials
Thermal Values
MinimumThickness
(rounded to nearest 1/8 inch)
kM = k value per inch of alternate material
rM = r value per inch of alternate material
TM = minimum thickness required for alternate material
TS = standard thickness of the alternate material
k (per inch) r (per inch)
Min. Thickness
KM
rM
TM
Kaowool M Board
.47
.35
2.13
2.86
.56" (1/2")
.42" (3/8")
Micore 160™
U.S. Gypsum
kL = k value per inch of listed material
rL = r value per inch of listed material
TL = minimum thickness of listed material
Micore 300™
U.S. Gypsum
.46
2.17
.52
.55" (1/2")
Durock™ Cement Board
U.S. Gypsum
1.92
2.29" (2-1/4")
Note: An asterix "*" indicates, it is a value taken from Table 5.
Using the k formula:
Hardibacker™
1.95
2.30
2.82
.513
.435
.355
2.32" (2-3/8")
2.74" (2-3/4")
3.36" (3-3/8")
Hardibacker 500™
Minimum
k-value (per Inch) of
alternate material (kM) x
k-value (per inch)
Specified min.
thickness
thickness of
alternate
=
Cultered Stone Hearth-
stone™
of listed
material (TM)
of listed material (kL)
material (TL)
Wonderboard
3.23
.61
.31
3.85" (3-7/8")
.73" (3/4")
Super Firetemp M
Johns-Manville
1.64
TM (inches)
=
=
k
M
x
x
x
TL
1"
1"
*.84
Super Firetemp L
Johns-Manville
.54
1.85
.64" (5/8")
TM (inches)
*.35
*.84
Face brick
9.00
5.00
5.00
12.5
~11
.111
.20
10.71" (10-3/4")
5.95" (6")
Common brick
Cement mortar
Ceramic tile
Marble
.416 (inches)=
.416
.20
5.95" (6")
.08
14.88" (14-7/8")
13.10" (13-1/8")
Answer -TheminimumrequiredthicknessoftheMicore160is.417,"there-
fore round up to nearest standard thickness available which is 1/2."
~.09
Table 5
Using the r formula:
Minimum
thickness of
alternate
material
r-value (per Inch)
of listed material
r-value (per inch)
of alternate material
Specified min.
thickness
of listed
** If the hearth extension material(s) that is intended to be used is NOT listed
on Table 5, the material can still be used if the material(s) is noncombustible.
However,themanufacturerofthematerialmustprovideeitherthelistedk-value
per inch or r-value per inch with listed thickness so that the minimum thickness
required for the hearth can be calculated (per instructions on this Page and/or
as specified in the NFI Certification manuals).
=
x
x
material
rL
rM
TM (inches)
=
=
TL
Note: Also see NFI (National Fireplace Institute) Certification Manuals showing
other exceptable caluculation methods and acceptable alternate materials
which can be used.
TM (inches)
*1.19
* 2.86
x
x
1"
1"
.417 (inches)=
.416
Answer -TheminimumrequiredthicknessoftheMicore160is.417,"there-
fore round up to nearest standard thickness available which is 1/2."
21
Calculating Minimum Thickness if
Multiple Materials are Used
WARNING
The crack between the fireplace
andthehearthextensionmustbe
sealed with a noncombustible
material.
At times it is important to know what
combinationofmaterialsareacceptableforuse
as floor protection. The “R values” are used to
determineacceptablecombinationsofmaterials
because “R values” are additive where r and k
values are not.
7"
Max. Thickness Of Hearth Extension When
Non-Circulating Models Are On The Floor
AVERTISSEMENT
“R value” = 1/k = "r" x thickness of material
used
La fente entre le foyer et
l’extension d’âtre doit être
scellée avec un matériel non-
combustible.
Figure 54
Example: Given that the required “R value”
for a suitable floor protector used must be
equal to or greater than:
Secure the hearth extension to the floor to
prevent possible shifting.
“R” = rL x TL = 1.19 x 1” = 1.19."
If it is desired to elevate a marble hearth
extension to a level of 5” or more above
the floor surface. What combination of
noncombustible materials can be used to
accomplish this?
FINISH TO YOUR TASTE
WARNING
There are a wide variety of “finished looks” for
these fireplaces, from formal wall decor with
elaborate mantels to rustic wood paneling or
warm brick facings.
When installing hearth extension
in front of a non-circulating fire-
place model, the fireplace must be
raised if height of hearth extension
exceeds 7" above the bottom of
fireplace (Figure 54).
If common brick is used so that the 3 1/2”
dimension is the height, “R” for the common
Only noncombustible materials like stone, tile,
brick, etc., may overlap the black front facing.
Do not extend these materials beyond the black
facing and into the firebox area. Be sure not to
interfere with the installation and operation of
glass doors or block the upper or lower grilles.
Seal all joints between the black facing and
wall surrounds to prevent air intrusion. Use
noncombustible caulking material only to seal
the black metal facing to the surround material
on the finished wall.
brick becomes:
brick
“R”M = rM x TS = 0.20 x 3 1/2" = .70
Using 1/2” of mortar to set the brick, “R” for
the mortar is calculated as follows:
mortar
When installing the hearth exten-
sion be careful not to block the
heat-circulating air inlet grill on
circulating models.
“R”M = rM x TS = 0.20 x 1/2" = .10
Next, a 3/4" marble slab set in 1/2" mortar cov-
ers the brick, “R” for the marble and mortar
becomes:
AVERTISSEMENT
Combustible materials may project beyond the
sides of the fireplace opening as long as they
are kept within the shaded areas illustrated in
Figure 55.
marble
Eninstallantlaprolongationdefoyer
devant un modèle decirculation de
cheminée, la cheminée doit être
augmentée si la taille de la prolon-
gation de foyer excède 7”(pouces)
au-dessus du fond de la cheminée
(Figure 54).
“R”M = rM x TS = 0.05 x 3/4" = .038
mortar
“R”M = rM x TS = 0.20 x 1/2" = .10
The sum of all “R values” is: .70 + .10 +. 038
+ .10 = .938
Combustible Ma-
terials Allowed In
This would NOT be an acceptable combination
of material for the hearth extension since the
total calculated “R value” of the materials used
is under the required “R value” of 1.19. An
additional layer of insulating materials must
be used.
Fireplace
1"
1/2"
ShadedArea“Safe
Zone”
7"
45°
Eninstallantl’extensiond’âtrefaites
attention à ne pas bloquer la grille
d’entrée d’air sur les modèles à
circulation d’air.
12"
Min. Distance To
Protected Side Wall
7"
Note: Also see NFI Certification Manuals for
expanded explanation on calculating “R val-
ues” when multiple materials are used.
12"
Min. Distance To
Unprotected Side Wall
Figure 55
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
22
INSTALLATION COMPONENTS
The following items are available for use in the
installation of this appliance.
Locking Band
63L60
FLB
Firestop Spacer (Flat) (Single Pack) 63L29
Firestop Spacer (Flat) (Single Pack) 63L31
F8FS
F8FS-2
Firestop Spacer (Flat) (12 Pack)
94L76
F8FS-12
Firestop Spacer (30°)
Firestop Spacer (30°)
Firestop Spacer (45°) (Canadian) 63L33
63L30
63L32
F8FS30
F8FS30-2
FFS-45C
Storm Collar
Storm Collar (12 pack) 94L77
63L59
FSC
FSC-B-12
Spark Arrestor
(CT2 Termination)
63L57
FSA-2
Offset/ Return
Package (30°)
45° Offset/Return Package
(Canadian) 63L69
63L22
FTF8-ES30
FTF8-ES45C
Ref. Form #750,012M
Combination
Offset/Return Elbow
63L28
FTF8-OR15
Ref. Form #750,141M
H1935
36ABFOD-BS 36” Bi-Fold door, Stainless
Stabilizer
63L25
FTF8-S4
(Air Inlet supplied with
fireplace. Shownhereforre-
placement purposes only)
Ref. Form #750,191M
Outside Air Kit
H1964
OAK-OD
Ref. Form #750,140M
63L38
63L39
F8F6
F8F12
H1937 36-ODC
36” Stainless Weather Cover
Flashing
Chimney Section
63L10
63L13
H0522
63L14
63L15
FTF8-12
FTF8-18
FTF8-24
FTF8-36
FTF8-48
Ref. Form #750,198M
Air Gate is shown apart for illustration purposes only.
Air Gate Kit H1972 OAKG-OD
Ref. Form #750,080M
Canadian
Chimney Section
62L92
62L93
FTF8-18C
FTF8-36C
Cold Climate Kits
63L61
FTF8-CCK1-LD
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
23
Contains:
3
1
1
1
FTF8-36
F8FS
F8F6
F
T
F
8
7
-
P
C
I
C
P
-
8
7
F
T
F
S
U
P
A
R
R
U
Y
L
B
M
C
E
S
S
FTF8-CTD
H
I
M
N
E
B
Y
Y
L
E
N
M
I
H
A
C
S
S
E
M
Y
A
B
Contemporary Termination -
Round
63L42
FTF8-CTD
Contemporary Termination -
Chimney Pack (conventional)
Convenience Pack - Residential 63L70
D
Round, Black
H2238
FTF8-CTDP
FTF8-CP7
C
Ref. Form #750,194M
CLOSED TOP SHROUD TERMINATION KITS
Inches (millimeters)
Cat. #
Model
A
B
C
D
Ref. Form #750,036M
34"
5"
34"
34"
H1988 CTSA-33
(864) (127) (864) (864)
Chase Termination
(Round)
8” Arch Top Termination
H0203
FTF8-CTDTM
(For shrouds closed above) 96L22
FTF8-ATT
1
typ.
CTSO-46 Shroud
for double
terminations
2a
2b
C
2a
E
2b
2a
D
Ref. Form #750,015M
Chase Termination - Pyramid
2b
2a
(Square)
63L48
FTF8-CT1
FTF8-CT1P
B
Ref. Form #750,016M
Chase Termination - Pyramid, Black
A
Chase Termination
(Square)
(Square)
91L79
63L51
FTF8-CT2
C
1
typ.
typ.
2
E
D
Ref. Form #750,034M
Attic Shield Assembly
4 ea. Shroud Legs
63L67
FTF8-FSAS
B
A
Ref. Form #750,077M
CTSO-33/44 Shrouds
for Single terminations
8” Open Top Termination (clay top termination)
(For open top shrouds) 96L20 FTF8-CTT
Ref. Form #750,193M
OPEN TOP SHROUD KITS
Inches (millimeters)
Cat. #
Model
A
B
C
D
*E
37-5/8
(955)
37-5/8
(955)
7-1/2 In.
(191)
24-1/2
(622)
3 In.
(76)
H1985 CTSO-33
H1987 CTSO-44
H1986 CTSO-46
4 ea. Flashing
Spacers
48-5/8
(1235)
48-5/8
(1235)
7-1/2 In.
(191)
24-1/2
(622)
3 In.
(76)
Ref. Form #750,014M
Ref. Form #750,145M
48-5/8
(1235)
73 1/4
(1860)
7-1/2 In.
(191)
24-1/2
(622)
3 In.
(76)
Termination Shroud Leg Kit
H0911 SLK-4
Chase Termination
(Round)
63L45
FTF8-CTDT
The manufacturer reserves the right to make changes at any time, without notice, in design,
materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.
Printed in U.S.A. © 2005 by LENNOX HEARTH PRODUCTS
1110 West Taft Avenue
Orange, CA 92865
24
P/N 850,030M REV. B 04/2006
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