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E_
VENT TERMINAL
(_AIR
SUPPLY INLET
25-24-65-2
E_
AREAWHERE
TERMINAL
IS NOT PERMITED
Item
Clearance Descriptions
Canadian fastaHaflon (1)
U.S fastallation (2)
A
Clearance above grade, veranda, porch, deck, bafaony, or
12 (3Ocm) #
12" (36 cm)
anticipated snow level
E
Clearancetoawindowordoorthatmaybeopened
6" (15cm)forapplia_ices
10,OOOBTUH(3kW),12
(30
4"(12m)belowortothesideoftheopenfag'l(3Ocm)
cm) for appliances > 10,OOOStut'd3 kW) and
100,OOO Btuh
above the opening
(36 kW)j'36
(91 cm)for appliances > 100.000 Btuh (30 kW)
C
Clearance to a permanently dosed window
D
Vertical clearance to a ventilated soffit located above the
termina_ within a horizontal distance of 2'(61 cm) from the
centedine of the terminal
E
Clearance to an unventilated soffit
F
Clearance to an outside cornet
G
Clearance to an inside corner
H
Clearance to each side of the centedine extended above
_ (91 cm) within 15"(4.5 m) above the meter/regulator
3" (91 cm) withih 15 (45 m) above the meter/regulator
electrical meter or gas service regulator assembly
assembly
assembly
Clearance to service regulator vent outlet
_ (91 cm)
J
Clearancetonon-mechanicalairsupplyin_ettobuildfagor
6" (15cm)forapplia_ces
10,OOOBTUH(3kW),12
(30
4" (12m)belowortothesideofdpening:1
(3Ocm)above
the combustion air inlet to any other appliance
cm) for appliances > 1O,OOOBtuh_3 kW) and
1OO,6OOEtuh
opening
(36 kW)j'36
(91 cm) for appliances > 100,660 Etuh (30 kW)
K
Clearance to a mechanical air supply inlet
6 (1 83 m)
3 (91 cm) above if withfa 10'(3m horizontally)
L
Clearance under a verand& porch, deck, or balcony
12" (30 cm) +
M
7' (2.13m)
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
N
Clearance to the vent terminal of a dryer vent, water heater
vent, or other appliances direct vent intake or exhaust
O
Clearance from a plumbing vent stack
p
Clearance above paved sidewalk or paved
7' (2 13m)**
driveway located on public property
(1)
In accordance with the current CSA B149.1, Natural Gas and Propane fastallaflon Code
(2)
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
#
18" (46 cm) above roof surface
+
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 t/NFPA 54 or CSA E149.1, clearances shall be in accordance with Iocat installation codes and the requirements of the gas supplier and the
Manufacturer's installation instructions
**
A vent shall not terminate 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 operation 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 recirculafion of the combus6ob products of adjacent vents
Recircuiation
can cause poor combustion,
inlet condensate problems, and accelerated corrosion of the heat exchangers
3
Avoid venting under a deck or large overhang
Recirculafion
could occur and cause performance
or system problems
A05013
-_ Table 10--Other
than Direct Vent Termination Clearance
30
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