Description
US Installations
1
1
,
2
2
Canadian
Installations
2
,
3
3
J Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance
6 in (15 cm) for
appliances ≤ 10,000
Btuh (3 kW), 12 in
(30 cm) for
appliances > 10,000
Btuh (3 kW) and ≤
100,000 Btuh (30
kW), 36 in (91 cm)
for appliances
>100,000 Btuh (30
kW)
6 in (15 cm) for
appliances ≤ 10,000
Btuh (3 kW), 9 in (23
cm) for appliances >
10,000 Btuh (3 kW)
and ≤ 50,000 Btuh
(15 kW), 12 in (30
cm) for appliances >
50,000 Btuh (15 kW)
K Clearance to mechanical air supply inlet 6 ft (1.83 m) 3 ft (91 cm) above if
within 10 ft (3 m)
horizontally
L Do not terminate above paved sidewalk or
paved driveway
7 ft (2.13 m)
4
Vents cannot be
located above public
walkways or other
areas where
condensate or vapor
can cause a
nuisance or hazard*
M Clearance under veranda, porch, deck or
balcony
12 in (30 cm)
5
*
Table 5 Vent/air inlet termination clearances
Warning
Important!: Maintain at least the minimum separation of exhaust vent termination
from boiler intake air as illustrated in Figure 20 , Figure 21 , Figure 22 and Figure 23 .
Failure to do so can result in a dangerous situation where exhaust gasses are re-
ingested with combustion air. Damage to the boiler can result from a failure to
maintain these separations. Third party vent termination kits and concentric wall
penetration kits that do not maintain these minimum separations must not be used.
Improper installation will void the warranty. Do not use proprietary InnoFlue or
PolyPro PPs terminals without specific approval from IBC.
1
In accordance with the current CAN/CSA-B149 Installation Codes.
2
If locally adopted installation codes specify clearances different than those illustrated, then the most stringent shall apply.
3
In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
4
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both
dwellings.
5
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
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