Description
Canadian
Installations
1,2
1 2
US Installations
2,3
3
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 7 Vent/air inlet termination clearances
Sidewall direct vent with separate vent and air pipes must be terminated as follows:
Locate the intake air and exhaust vent terminations on the same plane (side) of the
building.
Place the exhaust vent termination so that it reaches minimum 12" above the down-turned
intake to avoid exhaust re-ingestion.
(Optionally) Raise the elevation of exhaust termination “periscope style” after passing
through the wall, to gain the required clearance as shown in Figure 16 and Figure 17 .
Use a 45° elbow on the exhaust termination to launch the plume up and off the sidewall (for
protection of wall). A short piece of venting cut at 45° gives a horizontal termination
protected from wind loads (see Figure 17 , and Figure 19 ).
Recommended: the use of a bird screen of ¼" stainless steel or plastic mesh (IPEX
System 636 drain grate) to guard against foreign objects.
Caution
Refer to local code requirements or restrictions when installing concentric side wall
termination kits. Ensure that the termination and venting slope back to the appliance.
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 / NFPA54 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.
3.7.6 Sidewall vent termination
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