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935CA: Installation, Start-up, Operating and Service and Maintenance Instructions
NOTE: The following is based upon National codes for gas appliances and is provided as a reference.
Refer to local codes which may supersede these standards and/or recommendations.
Item
Clearance Description
Clearance above grade, veranda, porch, deck,
A
balcony or anticipated snow level
Clearance to a window or door that may be
B
opened
C
Clearance to a permanently closed window
Vertical clearance to a ventilated soffit located
above the terminal within a horizontal distance
D
of 2 feet (61 cm) from the centerline of the
terminal
E
Clearance to an unventilated soffit
F
Clearance to an outside corner
G
Clearance to an inside corner
Clearance to each side of the centerline
H
extended above electrical meter or gas service
regulator assembly
I
Clearance to service regulator vent outlet
Clearance to non—mechanical air supply inlet
J
to building or the combustion air inlet to any
other appliance
K
Clearance to a mechanical air supply inlet
Clearance under a veranda, porch, deck, or
L
balcony
Clearance to each side of the centerline
extended above or below vent terminal of the
M
furnace to a dryer or water heater vent, or
other appliance's direct vent intake or exhaust
Furnace combustion air intake clearance to a
N
water heater vent, dryer vent or other types of
appliance exhausts.
0
Clearance from a plumbing vent stack
Clearance above paved sidewalk or paved
P
driveway located on public property
> greater than, ≥ greater than or equal to, < less than, ≤ less than or equal to
Notes:
1.
In accordance with the current CAN/CSA B149.1, Natural Gas and Propane Installation Code.
2.
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
3.
NOTE: This table is based upon National codes for gas appliances, and are provided as a reference.
Refer to Local codes which may supersede these standards and/or recommendations.
4.
For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA B 149.1, clearances shall be in accordance with local installation codes and the requirements of the gas supplier
and the manufacturer's installation instructions.
5.
When locating vent terminations, consideration must be given to prevailing winds, location, and other conditions which may cause recirculation of the combustion products of
adjacent vents. Recirculation can cause poor combustion, inlet condensate problems, vent termination icing and/or accelerated corrosion of the heat exchangers.
6.
Design and position vent outlets to avoid ice build-up on and moisture damage to surrounding surfaces.
7.
The vent for this appliance shall not terminate:
a. Near soffit vents of crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or property damage; or
b. Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 60 – Direct Vent Termination Clearance
Canadian Installations
(per CAN/CSA B149.1)
12 in. (305 mm)
18 in. (457 mm) above roof surface.
12 in. (305 mm) for appliances >10,000 BTUh (3 kW)
and </=100,000 BTUh (30 kW),
36 in. (914 mm) for appliances >100,000 BTUh (30 kW)
For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA B149.1, clearances shall be in accordance with
local installation codes and the requirements of the gas supplier and the manufacturer's installation instructions.
Manufacturer's Recommendation: See Notes 3-8.
3 ft. (.9 M) within 15 ft. (4.6 M)
above the meter/regulator assembly.
3ft. (.9 M)
12 in. (305 mm) for appliances >10,000 Btuh(3 kW)
and </= 100,000 BTUh (30 kW),
36 in. (914 mm) for appliances >100,000 BTUh (30 kW)
6 ft. (1.8 M)
12 in. (305 mm).
Permitted only if veranda, porch, deck, or balcony is fully open
on a minimum of two sides beneath the floor.
12 in. (305 mm)
3 ft. (.9 M)
3 ft. (.9 M)
7 ft. (2.1 M)
Vent shall not terminate above a sidewalk or paved driveway
that is located between two single family dwellings and serves
both dwellings.
44
V
V
(1 )
U.S. Installations
(per ANSI Z223.1/NFPA 54)
9 in. (229 mm) for appliances >10,000 BTUh (3
and </= 50,000 BTUh (15 kW),
12 in. (305 mm) for appliances >50,000 BTUh
3 ft. (.9 M) within 15 ft. (4.6 M)
above the meter/regulator assembly.
9 in. (9 mm) for appliances >10,000 BTUh (3 kW)
and </= 50,000 BTUh (15 kW),
12 in.(305 mm) for appliances >50,000 BTUh
3ft. (.9 M) above if within 10 ft. (3 M) horizontally
Manufacturer's Recommendation: See Notes 3-8.
Manufacturer's Recommendation: See Notes 3-8.
A12326
(2 )
12 in. (305 mm)
kW)
(15kW)
See Note 4.
(15kW)
See Note 4.
12 in. (305 mm)
3 ft. (.9 M)
3 ft. (.9 M)
See Note 4.
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