Carrier 59SC2A - Page 57

VENT TERMINAL
®) AIR SUPPLY INLET
LLELTLIER
EL
RELL
AREA WHERE TERMINAL IS NOT PERMITED
A12325
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.
Canadian Installations ()
U.S. Installations (7
on public property
Item Clearance Description (per CAN/CSA B149.1) (per ANSI 2223.1/NEPA 54)
Clearance above grade, veranda, porch, deck, balcony or 12 in. (805 mm) .
A anticipated snow level 18 in. (457 mm) above roof surface. 12 in. (305 mm)
12 in. (805 mm) for appliances >10,000 Btuh (3 kW) 4ft. (1.2M) below or to the side of the opening,
B Clearance to a window or door that may be opened and </=100,000 Btuh ( 30 kW}, 1 ft (3M) above the opening.
36 in. (914 mm) for appliances >100,000 Btuh (30 kW) Manufacturer’s Recommendation: See Note 8.
Cc Clearance to a permanently closed window
Vertical clearance to a ventilated soffit located above the
D terminal within a horizontal distance of 2 feet (61 cm} from | For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA B149.1, clearances shall be in accordance with local
the centerline of the terminal installation codes and the requirements of the gas supplier and the manufacturer's installation instructions.
E Clearance to an unventiiated sofft Manufacturer's Recommendation: See Notes 3-8.
F Clearance to an outside corner
G Clearance to an inside corner
H Clearance to each side of the centerline extended above 3 ft. (9 M) within 15 ft. (4.6 M) 3 ft. (9 M) within 15 ft. (4.6 M)
electrical meter or gas service regulator assembly above the meter/regulator assembly. above the meter/regulator assembly.
I Clearance to service regulator vent outlet Sft. (9 M) See Note 4.
Clearance to non—mechanical air supply inlet to building or 12 in. (305 mm) for appliances >10,000 Btuh(3 kW) Aft. (1.2M) below or to the side of the opening,
J the combustion air inlet to any other appliance and </= 100,000 Btuh { 30 kW), 1 ft (3M) above the opening.
y PP 36 in. (914 mm) for appliances >100,000 Btuh (30 kW) Manufacturer’s Recommendation: See Note 8
K Clearance to a mechanical air supply inlet 6 ft. (1.8 M) Sft. (9 M)
12 in. (805 mm). See Note 4.
L Clearance under a veranda, porch, deck, or balcony Permitted only if veranda, porch, deck, or balcony is fully open
on a minimum of two sides beneath the floor. Manufacturer's Recommendation: See Notes 3-8.
Clearance to each side of the centerline extended above or
M below vent terminal of the furnace to a dryer or water heater 12 in. (305 mm) 12 in. (805 mm)
vent, or other appliance’s direct vent intake or exhaust
Inlet air clearance to a moisture exhaust duct
N (dryer vent, spa exhaust, etc.) 3 ft. {-9 M) 3 ft. {-9 M)
0 Clearance from a plumbing vent stack 3 ft. (9 M) 3 ft. (9 M)
7 ft. (2.1 M).
P Clearance above paved sidewalk or paved driveway located | Vent shall not terminate above a sidewalk or paved driveway 7ft. (21M)
that is located between two single-family dwellings and serves
both dwellings.
> greater than, = greater than or equal to, < less than, < less than or equal to
Notes:
In accordance with the current CAN/CSA B149.1, Natural Gas and Propane Installation Code.
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
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.
For clearances not specified in ANS] 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.
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 condensation problems, and/or accelerated corrosion of the heat exchangers.
Design and position vent outlets to avoid ice build-up on and moisture damage to surrounding surfaces.
The vent for this appliance shall not terminate:
. 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.
These National standards apply to all non-direct-vent gas appliances. Contact Local code officials for additional requirements and/or exclusions.
Fig. 46 - Ventilated Combustion Air and Non-Direct Vent Termination Clearance
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59SC2A