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Other than Direct Vent Termination Clearance
IVIVENTTERMINAL AIRSUPPLVINLET
Clearance Descriptions Canadian Installation (1)
Clearance above grade, veranda, porch, deck, balcony, or 12" (30cm) #
anticipated snow level
Clearance to a window or door that may be opened
Clearance to a permanently closed window
Vertical clearance to a ventilated soffit located above the ter-
minal within a horizontal distance of 2' (61cm) from the cent-
edine of the terminal
Clearance to an unventilated soffit
Clearance to an outside corner
Clearance to an inside corner
Clearance to each side of the centedine extended above elec-
trical meter or gas service regulator assembly
Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance
Clearanceto amechanicalair supplyinlet
Clearanceundera veranda,porch,deck,or balcony
6" (15 cm) for appliances _< 10,000 BTUH (3kW), 12" (30
cm) for appliances > 10,000 Btuh (3 kW) and _<100,000 Btuh
(30 kW), 36" (91 cm) for appliances > 100,000 Bluh (30 kW)
3' (91 cm) within 15' (4.5 m) above the meter/regulator
assembly
3' (91 cm)
6" (15 cm)forappliances_<10,000BTUH(3kW),12" (30
cm)forappliances> 10,000Btuh(3kW) and _<100,000Btuh
(30 kW),36" (91cm)forappliances> 100,000Btuh(30 kW)
6' (1.83m)
12" (30cm) +
Clearance to each side of the centedine extended above or *
below vent terminal of the furnace to a dryer or water heater
vent, or other appliance's direct vent intake or exhaust.
Clearance from a plumbing vent stack 3' (91 cm)
Clearance above a paved sidewalk or paved driveway located 7' (2.13 m)
on public properly.
(I.) InaccordancewiththecurrentCSAB149.1,NaturalGasandPropanelnstaHationCode
(2.) In accordance with the current ANSI Z223.11NFPA 54, Nafional Fuel Gas Code
# 18" (46 cm) above roof surface
AREA WHERE TERMINAL IS NOT PERMITED
U.S. Installation (2)
12" (30 cm)
4' (1.2 m) below or to the side of the opening. 1' (30 cm)
above the opening.
3' (91 cm) within 15' (4.5 m) above the meter/regulator
assembly
4' (1.2 m) below or to the side of opening: 1' (30 cm) above
opening,
3' (91 cm) above if within 10' (3m) horizontally
3'(01cm)
7'(2.13m)
+ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearances shall be in accordance with local installation codes and the requirements of the gas supplier and the manufacture's
installation instructions.
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
Notes:
1. The vent for this appliance shall not terminate
a. Over public walkways; or
b. Near soffit vents or crawl space vents or other areas where condensate or vapor could create a nusiance or hazard or property damage; or
c. Where condensate vapor could cause damage or could be detrimental to the operafion of regulators, relief valves, or other equipment.
2. When locating vent terminations, consideration must be given to prevailing winds, location, and other conditions which may cause recirculation of the combusfiob products of adjacent vents.
Recirculafion can cause poor combustion, inlet condensate problems, and accelerated corrosion of the heat exchangers.
441 O1 261302
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