Convertible Direct Vent
Fireplaces: 360DVS2
360DVS3
360DVSL
360DVSR
INSTALLER/CONSUMER
SAFETY INFORMATION
PLEASE READ THIS MANUAL
BEFORE INSTALLING AND USING
APPLIANCE
IMPORTANT: Read all instructions
and warnings carefully before
starting installation. Failure to follow
these instructions may result in a
possible fire hazard, and will void the
warranty.
WARNING:
manual is not followed exactly, a fire or
explosion may result, causing property
damage, personal injury, or loss of life.
If the information in this
FOR YOUR SAFETY:
• Installation and service must be per
formed by a qualified installer, service
agency, or
the gas supplier.
• Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
If you smell gas:
1. Open windows
2. Do not touch electrical switches.
3. Do not try to light any appliance.
4. Extinguish any open flame.
5. Do not use any telephone in your
building.
6. Immediately call your gas supplier
from a neighbor’s phone.
7. Follow your gas supplier’s
instructions.
8. If you cannot reach your gas supplier,
call the fire department.
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Homeowner’s Installation
and Operating Manual
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
10006326 4/08 Rev. 5
360 DVS Series Direct Vent Fireplaces
Table of Contents
Thank you, and Congratulations on your purchase of a CFM Corporation Fireplace.
PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE.
IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these
instructions fully may result in a possible fire hazard and will void the warranty.
Installation and Operating Instructions ........................................................................................................3
Important Curing/Burning Instructions ................................................................................................
Replacement Parts .......................................................................................................................................36
Optional Accessories
Fan Kits .............................................................................................................................................
This gas appliance should be installed by a qualified installer,
preferably NFI or WETT (Canada) certified, in accordance
with local building codes and current CSA-B149.1 Installation
Codes for Gas Burning Appliances and Equipment. If the unit
is being installed in a mobile home, the installation should comply
with the current CAN/CSA Z 240.4 code. For U.S.A. Installations,
follow local codes and/or the current National Fuel Gas Code,
ANSI Z223.1/NFPA 54.
FOR SAFE INSTALLATION AND OPERATION PLEASE
NOTE THE FOLLOWING:
1. This fireplace gives off high temperatures and should be located
out of high traffic areas and away from furniture and draperies.
2. Children and adults should be alerted to the hazards of high
surface temperatures of this fireplace and should stay away
to avoid burns or ignition of clothing.
3. CAUTION: Due to high glass surface temperature, chil-
dren should be carefully supervised when in the same
room as fireplace.
11. When the fireplace is installed directly on carpeting, vinyl
tile, or any combustible material other than wood, it must be
installed on a metal or wood panel extending the full width
and depth of the fireplace.
12. This fireplace requires adequate ventilation and combustion
air to operate properly.
13. This fireplace must not be connected to a chimney flue serving a
separate solid fuel-burning fireplace.
14. When the fireplace is not in use, it is recommended the gas
valve be left in the “OFF” position.
WARNING: Check with your electronics manufacturer
before installing a television or other electronic device above this fireplace.
360DVS2/ 360DVS3/ 360DVSL/ 360DVSR
CERTIFIED TO
ANSI Z21.88-2005 / CSA 2.33-2005
Vented Gas Fireplace Heaters
This appliance may be installed in an aftermarket, permanently located, manufactured home, or mobile home
where not prohibited by local codes.
This appliance is only for use with type of gas
indicated on the rating plate. This appliance is not convertible for use with other gases, unless a certified kit is
used.
4. Under no circumstances should this fireplace be modified.
Parts removed for servicing should be replaced prior to
operating this fireplace again.
5. Installation and any repairs to this fireplace must be per
formed by a qualified installer, service agency or gas sup
plier. A professional service person should be contacted to
inspect this fireplace annually. Make it a practice to have
all of your gas fireplaces checked annually. More frequent
cleaning may be required due to excess lint and dust from
carpeting, bedding material, etc.
6. Control compartments, burners and air passages in this fireplace should be kept clean and free of dust and lint. Make
sure the gas valve and pilot light are turned off before you
attempt to clean this fireplace.
7. The venting system (chimney) of this fireplace should be
checked at least once a year, and if needed, your venting
system should be cleaned.
8. Keep the area around your fireplace clear of combustible
materials, gasoline and other flammable vapor and liquids.
This fireplace should not be used as a drying rack for cloth
ing, nor should Christmas stockings or decorations be hung
on or around the fireplace.
9. Under no circumstances should any solid fuels (wood, coal,
paper or cardboard, etc.) be used in this fireplace.
10. The flow of combustion and ventilation air must not be obstructed in any way.
10006326
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IMPORTANT:
PLEASE REVIEW THE FOLLOWING CAREFULLY
Remove any plastic from trim parts before turning the
fireplace ON.
It is normal for fireplaces fabricated of steel to give off
some expansion and/or contraction noises during the
start up or cool down cycle. Similar noises are found with
your furnace heat exchanger or car engine.
It is not unusual for your gas fireplace to give off some
odor the first time it is burned. This is due to the curing of
the paint and any undetected oil from the manufacturing
process.
Please ensure that your room is well ventilated - open
all windows.
It is recommended that you burn your fireplace for at least
ten (10) hours the first time you use it. If the optional fan
kit has been installed, place the fan switch in the “OFF”
position during this time.
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Proposition 65 Warning: Fuels used in gas, woodburning or oil fired appliances, and the products of
combustion of such fuels, contain chemicals known to
the State of California to cause cancer, birth defects
and other reproductive harm.
California Health & Safety Code Sec. 25249.6
3
360 DVS Series Direct Vent Fireplaces
Requirements for the Commonwealth of
Massachusetts
All gas fitting and installation of this heater shall only be
done by a licensed gas fitter or licensed plumber.
For all side wall horizontally vented gas fueled
equipment installed in every dwelling, building or
structure used in whole or in part for residential
purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust
vent termination is less than seven (7) feet above
finished grade in the area of the venting, including
but not limited to decks and porches, the following
requirements shall be satisfied:
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal
vented gas fueled equipment, the installing plumber
or gas fitter shall observe that a hard wired carbon
monoxide detector with an alarm is installed on each
additional level of the dwelling, building or structure
served by the side wall horizontal vented gas fueled
equipment. It shall be the responsibility of the property
owner to secure the services of qualified licensed
professionals for the installation of hard wired carbon
monoxide detectors.
In the event that the side wall horizontally vented gas
fueled equipment is installed in a crawl space or an
attic, the hard wired carbon monoxide detector with
alarm and battery back-up may be installed on the next
adjacent floor level.
In the event that the requirements of this subdivision
can not be met at the time of completion of installation,
the owner shall have a period of thirty (30) days
to comply with the above requirements; provided,
however, that during said thirty (30) day period, a
battery operated carbon monoxide detector with an
alarm shall be installed.
Approved Carbon Monoxide Detectors
Each carbon monoxide detector as required in
accordance with the above provisions shall comply with
NFPA 720 and ANSI/UL 2034 listed and IAS certified.
Signage
A metal or plastic identification plate shall be
permanently mounted to the exterior of the building at
a minimum height of eight (8) feet above grade directly
in line with the exhaust vent terminal for the horizontally
vented gas fueled heating appliance or equipment. The
sign shall read, in print size no less than one-half (1/2)
inch in size, “GAS VENT DIRECTLY BELOW, KEEP
CLEAR OF ALL OBSTRUCTIONS”.
Inspection
The state or local gas inspector of the side wall
horizontally vented gas fueled equipment shall not
approve the installation unless, upon inspection, the
inspector observes carbon monoxide detectors and
signage installed in accordance with the provisions of
248 CMR 5.08(2)(a)1 through 4.
Exemptions
The following equipment is exempt from 248 CMR
5.08(2)(a)1 through 4:
• The equipment listed in Chapter 10 entitled
“Equipment Not Required To Be Vented” in the most
current edition of NFPA 54 as adopted by the Board;
and
• Product Approved side wall horizontally vented gas
fueled equipment installed in a room or structure
separate from the dwelling, building or structure
used in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS
Gas Equipment Venting System Provided
When the manufacturer of Product Approved side
wall horizontally vented gas equipment provides a
venting system design or venting system components
with the equipment, the instructions provided by the
manufacturer for installation of the equipment and the
venting system shall include:
• Detailed instructions for the installation of the venting
system design or the venting system components;
and
• A complete parts list for the venting system design or
venting system.
Gas Equipment Venting System NOT Provided
When the manufacturer of a Product Approved side
wall horizontally vented gas fueled equipment does
not provide the parts for venting the flue gases, but
identifies “special venting systems”, the following
requirements shall be satisfied by the manufacturer:
• The referenced “special venting system” instructions
shall be included with the appliance or equipment
installation instructions; and
• The “special venting systems” shall be Product
Approved by the Board, and the instructions for
that system shall include a parts list and detailed
installation instructions.
A copy of all installation instructions for all Product
Approved side wall horizontally vented gas fueled
equipment, all venting instructions, all parts lists
for venting instructions, and/or all venting design
instructions shall remain with the appliance or
equipment at the completion of the installation.
4
10006326
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F
C
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Electrical
Access
Gas Line
Access
Electrical
Access
Gas Line
Access
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Electrical
Access
Gas Line
Access
Electrical
Access
Gas Line
Access
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Rear Vent Configuration
Top Vent Configuration
360DVS Series Direct Vent Fireplaces
Fireplace Dimensions - 360DVS2
Fig. 1a Fireplace specifications—360DVS2
Appliance Dimensions
Ref. Rear Vent Configuration Top Vent ConfigurationA 38¹⁄₈” (968 mm) 38¹⁄₈” (968 mm)
B 43
¹⁄₄” (1099 mm) 43¹⁄₄” (1099 mm) C 24” (610 mm) 24” (610 mm)
D 24” (610 mm) 24” (610 mm)
E 37
F 35⁷⁄₈” (911 mm) 35⁷⁄₈” (911 mm)
G 30¹⁄₂” (775 mm) 7” (178 mm)
H 12” (305 mm) 12” (305 mm)
I 3
Ref. Rear Vent Configuration Top Vent ConfigurationA 38
B 40
C 24” (610 mm) 24” (610 mm)
D 24” (610 mm) 24” (610 mm)
E 37
F 35
G 30
H 12” (305 mm) 12” (305 mm)
I 3
J 2
K 1
Ref. Rear Vent Configuration Top Vent ConfigurationModel 360DVS3 360DVSL/R 360DVS3 360DVSL/RROD (See Note 1) (See Note 2) (See Note 1) ( See Note 2)
ROH 38
to 3¹⁄₈” (79 mm) allowance for flue collar
ROW 40
NOTE 1: 24” (610 mm) minus two times (2x) finishing material thickness to be even with face of unit.
NOTE 2: 24³⁄₄” (629 mm) minus one time (1x) finishing material thickness to be even with face of unit.
8
⁵⁄₈” (981 mm) Not to be framed until unit is set in place, due
⁵⁄₈” (1032 mm) minus one time (1x) finishing material thickness to be even with face of unit.
CFM124
10006326
A B C D E
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Fig. 3 Locating your gas fireplace
X
X
X
Y
Y
Y
Z
A
A
B
A Wall Location (Fig. 3)
Y (Minimum distance between a glass panel and a
Z (Minimum distance between edge of a glass panel
B Island Location (Fig. 3)
X (Maximum length of horizontal venting) = 20’ (6.1m)
Top of unit to ceiling ................................. 36” (914 mm)
Front of unit to combustibles ................... 36” (914 mm)
Appliance
Top .........................................0” (0 mm) to standoff
Side and bottom .................................... 1” (25 mm)
Top ........................................................ 2” (51 mm)
The height at which a combustible mantel is fitted
above the fireplace is dependent on the depth of the
mantel. This also applies to the distance between the
mantel leg (if so fitted) and the fireplace. For correct
mounting height and width, refer to Fig. 4a and 4b and
the Mantel Chart below.
The fitting of a bay window trim kit does not affect the
distances and reference points referred to in the diagram and chart.
Noncombustible mantels and legs may be installed at
any height and width around the appliance.
When using paint or lacquer to finish the mantel, such
paint or lacquer must be heat resistant to prevent discoloration.
10006326
Locating Your Fireplace
LU584-2
parallel wall) = 3’ (914mm)
and an adjacent wall) = 3” (76mm)
Refer to the venting section in this manual for specific dimensions.
Clearance to Combustibles
1” (25 mm)
Mantels
360DVS Series Direct Vent Fireplaces
Fireplace
Louvre Assembly
Top
Top of Combustion
Chamber
Bottom of Door Trim
Mantel Chart
Mantel Shelf Mantel from Top
Ref. or Breast Plate Ref. of Comb. Chamber
V 10” (254 mm) A 19” (483 mm)
W 8” (203 mm) B 17” (432 mm)
X 6” (152 mm) C 15” (381 mm)
Y 4” (102 mm) D 13” (330 mm)
Z 2” (51 mm) E 11” (297 mm)
Fig. 4a Combustible mantel minimum installation.
Top View
Mantel Leg
CFM197
Front View
Side of Combustion
Chamber
Mantel Mantel Leg From Side
Ref. Leg Depth Ref. of Comb. Opening
F 10” (254 mm) K 11¹⁄₂” (292 mm)
G 8” (203 mm) L 9¹⁄₂” (241 mm)
H 6” (152 mm) M 7
I 4” (102 mm) N 5
J 2” (51 mm) O 3¹⁄₂” (89 mm)
Fig. 4b Combustible mantel leg minimum installation.
¹⁄₂” (191 mm)
¹⁄₂” (140 mm)
CFM146
Mantel
Leg
CFM170
9
360 DVS Series Direct Vent Fireplaces
Hearth
A hearth is not mandatory; however, for aesthetic
purposes, we recommend installing a noncombustible
hearth that projects out 12” (305mm) or more from the
front of the fireplace.
Cold climate installation recommendation:
When installing this unit against a noninsulated exterior wall or chase, it is mandatory
the outer walls be insulated to conform to
applicable insulation codes.
Framing & Finishing
1. Choose the unit location.
2. Place the unit into position and secure it to the floor
with 1¹⁄₂” (38mm) screws or nails. Holes to secure
the unit to the floor are located behind the access
door grille on the left and right sides of the unit.
3. Frame in the fireplace with a header across the top.
It is important to allow for the finished wall face when
setting the depth of the frame.
4. Drywall (sheetrock) or wood material may be placed
with a zero clearance to the top edges of the appliance when finishing walls above sides of the appliance with glass windows. NOTE: Attach wall finish-
ing to constructed frame, not the appliance.
5. On 360DVSL and 360DVSR, drywall, wood, or wood
molding may be placed with zero clearance to the
rear wall of the unit, along the vertical edge formed
by the standoffs, to intersection of the rear wall, to
the side wall having the small glass window. NOTE:
Attach wall finishing to constructed frame, not
the appliance.
Final Finishing
Noncombustible materials such as brick or tile may be
extended over the edges of the face of the appliance.
DO NOT cover any vent or grille panels.
If a Trim Kit is going to be installed on the fireplace, the
brick or tile will have to be installed flush with the edges
of the appliance.
When purging the gas lines, the window
frame assembly must be removed.
The gas pipeline can be brought in through the vent
end of the fireplace as well as the bottom. Knockouts
(to allow gas pipe installation and testing any gas connection) are provided on the bottom behind the valve.
It is most convenient to bring the gas line in from the
vent end of the valve, as this allows fan installation or
removal without disconnecting the gas line.
The gas line connection can be made with properly
tinned 3/8” copper tubing, 3/8” rigid pipe, or an approved flex connector. Since some municipalities have
additional local codes, it is always best to consult your
local authority and the CSA-B149.1 installation codes.
For USA installations, consult the current National Fuel
Gas Code, ANSI Z223.1/NFPA 54.
Always check for gas leaks with a mild
soap and water solution. Do not use an
open flame for leak testing.
The gas control is equipped with a captured-screw type
pressure test point, therefore it is not necessary to provide a 1/8” test point upstream of the control.
10
10006326
360DVS Series Direct Vent Fireplaces
TP
TH
TP
TH
1/2” Gas Supply
1/2” NPT X 1/2” Flare Shut-Off Valve
3/8” Flex Line
(From Valve)
FP297a
Fig. 5 Gas shutoff valve and flex connector.
When using copper or flex connector, use only approved fittings. Always provide a union when using
black iron pipe so that the gas line can be easily disconnected for burner or fan servicing. Refer to the gas
specification for pressure details and ratings.
Isolate or disconnect this or any other gas appliance control from the gas line when pressure testing.
DO NOT subject the fireplace valve to test
pressures exceeding 1/2 psi.
EB-1 Electrical Junction Box Connection
The fireplace, when installed, must be
electrically connected and grounded in accordance with local codes; in the absence
of local codes, use the current CSA C22.1
Canadian Electrical Code.
For USA installations, follow the local
codes and National Electrical Code ANSI/
NFPA No. 70.
It is strongly suggested the wiring of the
EB-1 Electrical Junction Box be carried out
by a licensed electrician.
Ensure power to the supply line has been
disconnected before commencing with this
procedure.
The EB-1 electrical junction box has been supplied
standard on this model to allow for easy connection of
the optional fan kits. (Fig. 6)
To connect the EB-1 box to the house electrical supply
follow the steps below.
1. Remove the front cover of the EB-1 box.
2. Remove the plug socket assembly from the EB-1
box.
3. Feed the supply line in from the out through the elec
trical knockout.
4. Connect the ground wire of the supply line to the
green screw of the socket assembly.
5. Connect the white wire of the power line to the
chrome screw of the socket assembly.
6. Connect the black wire of the power supply line to
the brass screw (polarized) of the socket assembly.
10006326
7. Refit the socket assembly back into the electrical
box and replace the cover plate.
8. The EB-1 electrical junction box is now ready to sup
ply power to the FK12 or FK24 fan kit, if used.
EB-1 Electrical box Depending on the specific model,
this box may be installed on
FP1428
Fig. 6 EB-1 attachment.
either side of the appliance.
Remote ON/OFF Switch Installation
Do not wire the remote ON/OFF wall switch
for this gas appliance into a 120V power
supply.
1. Thread the wiring through the holes on the end
panels of the appliance. Take care not to cut the wire
or insulation on metal edges. Route the wire to a
conveniently located receptacle box.
2. Attach the wire to the ON/OFF switch and install the
switch into the receptacle box.
3. Connect the other ends of the wire to the gas control
valve, as shown in Figure 7.
Remote ON/OFF Switch
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Fig. 7 Remote switch wiring diagram for R models.
Alternate Switch Location
The remote switch can be installed on the front or the
side of the access door. Simply mount the switch to the
bracket provided and screw the bracket to either side
of the frame, lining up the screws with the prepunched
holes. (Fig. 8)
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Electrical
Inlet Hole
Gas Inlet
Hole
Gas
Control
Valve
FP1429
11
360 DVS Series Direct Vent Fireplaces
FP1430
Fig. 8 Alternate switch location.
Optional Top Vent Application
This appliance is shipped as a rear vent unit. If the
installation layout requires the unit to be a top vent configuration, the appliance can be converted by following
the steps below.
When removing and refitting the plates and
adapter, be sure the associated gasket is
undamaged and refitted as required.
1. Remove the ten (10) screws securing the outer collar adapter to the fireplace body. (Fig. 9)
2. Set the collar aside, complete with the gasket.
NOTE: Do not damage the gasket, as the adapter
and gasket must be refitted.
3. Remove the insulation material (exposed in Step
2) from the top of the unit. (Fig. 10) This material
can be discarded; however, if the unit is converted
back to rear-vent, a new piece of insulation material
approved by CFM Corporation must be used for this
purpose.
NOTE: When converting appliance to top vent,
ensure the insulation material referred to in step 3 is
completely removed.
4. Remove the 4 screws securing the flue cover plate
to the top of the intake box and remove the cover
and gasket. (Fig. 11)
5. Remove 4 screws securing the flue pipe to back of
the intake box and remove pipe and gasket. (Fig. 11)
6. Secure the plate and gasket removed in step 4 over
the flue opening in the back of the intake box. En
sure the gasket is in place and undamaged.
7. Install the flue pipe and gasket removed in step 5
over the flue opening in the top of the intake box.
8. Refit the outer collar adapter and gasket to the unit
with the round collar on the top. Secure the adapter
with the 10 screws removed in step 1.
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Remove These Screws
Remove
These
Screws
Outer Collar Adapter
FP1431
Fig. 9 Remove screws from outer collar adapter.
Insulation Pad
(Must be removed)
Flue
Pipe
FP1432
Fig. 10 Remove flue cover and pipe.
Flue Cover
Plate
Flue
Pipe
12
FP1433
Fig. 11 Flue pipe removal.
10006326
Electronic Gas Control Valve
PILOT
HONEYWELL IGNITION MODULE
ORANGE
BLUE
BLACK
WHITE
NOVA SIT 822 VALV
E
HI
LO
POWER CORD
W/FEMALE SPADE
120 VAC RTN
WHITE
GREEN
BLACK
120 VAC HOT
BLACK
YELLOW
24 VAC RET
40VA TRANSFORMER
24 VAC HOT
BLACK
WHITE
WALL SWITCH
WHITE
OFF
1 2 3 5 6 8 9
MV MV/VP PV GRD 24V SENSE SPARK
24V
ORANGE
RED
GREEN
BLACK
This appliance may be fitted with a Honeywell ignition
module.
Installation of the remote ON/OFF starter switch on
electronic ignition units (Fig. 12):
1. Thread the wiring through the holes on the side
panels of the appliance. Take care not to cut the wire
or insulation on metal edges. Route the wire to a
conveniently located receptacle box.
2. Attach the wire to the ON/OFF switch and install the
switch into the receptacle box.
3. Connect the white wire from the wall switch to the
black wire from the transformer, using an approved
wire nut. Connect the black wire from the wall switch
to the black wire running from the #6 position of the
ignition module, also using an approved wire nut.
360DVS Series Direct Vent Fireplaces
General Venting
Your fireplace is approved to be vented either through
the side wall, or vertically through the roof.
• Only CFM Corporation venting components, specifi-
• Venting terminals shall not be recessed into a wall or
• Horizontal venting must be installed on a level plane
There must not be any obstruction such as bushes,
cally approved and labeled for this fireplace, may be
used.
siding.
without an inclining or declining slope.
FP1225
Fig. 12 Honeywell ignition module.
garden shed, fencing, deck or utility building within 24”
(610mm) from the front of the termination hood.
Do not locate the termination hood where excessive
snow or ice buildup may occur. Be sure to check the
vent termination area after snow falls; clear it to prevent
accidental blockage of the venting system. When using
a snow blower, make sure snow is not directed toward
the vent termination area.
Location of Vent Termination
It is imperative the vent termination be located observing minimum clearances as shown on the following
page.
10006326
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360 DVS Series Direct Vent Fireplaces
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VENT TERMINATION AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
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Operable
Fixed
Closed
V
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INSIDE
CORNER DETAIL
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CFM145a
General Venting Information - Termination Location
Canadian Installations1 US Installations
2
A = Clearance above grade, veranda, porch, 12” (30cm) 12” (30cm)
deck, or balcony
B = Clearance to window or door that may be 6” (15cm) for appliances 6” (15cm) for appliances
opened < 10,000Btuh (3kW), 12” (30cm) < 10,000 Btuh (3kW), 9”
for appliances > 10,000 Btuh (3kW) and (23cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91cm) Btuh (3kW) and < 50,000 Btuh
for appliances > 100,000 Btuh (30kW) (15kW), 12” (30cm) for
appliances > 50,000 Btuh (15kW)
C = Clearance to permanently closed window 12” (305mm) recommended to 12” (305mm) recommended to
prevent window condensation prevent window condensation
D = Vertical clearance to ventilated soffit located
above the terminal within a horizontal 18” (458mm) 18” (458mm)
distance of 2’ (610mm) from the center
line of the terminal
E = Clearance to unventilated soffit 12” (305mm) 12” (305mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner (see next page) see next page see next page
H = Clearance to each inside of center line 3’ (91cm) within a height of 15’ (5m) 3’ (91cm) within a height of 15’
extended above meter/regulator assembly above the meter/regulator assembly (5m) above the meter/regulator
assy
I = Clearance to service regulator vent outlet 3’ (91cm) 3’ (91cm)
J = Clearance to nonmechanical air supply inlet 6” (15cm) for appliances < 10,000 6” (15cm) for appliances
to building or the combustion air inlet to any Btuh (3kW), 12” (30cm) for < 10,000 Btuh (3kW), 9”
other appliances appliances > 10,000 Btuh (3kW) and (23cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91cm) Btuh (3kW) and < 50,000 Btuh
for appliances > 100,000 Btuh (30kW) (15kW), 12” (30cm) for
appliances > 50,000 Btuh (15kW)
K = Clearance to a mechanical air supply inlet 6’ (1.83m) 3’ (91cm) above if within 10
feet (3m) horizontally
L = Clearance above paved sidewalk or paved 7’ (2.13m)† 7’ (2.13m)†
driveway located on public property
M = Clearance under veranda, porch, deck or 12” (30cm)‡ 12” (30cm)‡
balcony
N = Clearance above a roof shall extend a minimum of 24” (610mm) above the highest point when it passes through the roof
surface, and any other obstruction within a horizontal distance of 18” (450mm).
1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes
† A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings
‡ only permitted if veranda, porch, deck or balcony is fully open on a minimum 2 sides beneath the floor:
NOTE: 1. Local codes or regulations may require different clearances.
2. The special venting system used on Direct Vent Fireplaces are certified as part of the appliance, with clearances tested and
approved by the listing agency.
3. CFM Corporation assumes no responsibility for the improper performance of the appliance when the venting system does not
meet these requirements.
Fig. 13 Vent termination clearances.
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