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FOR THE PROVINCE OF ONTARIO, HORIZONTAL SIDEWALL VENT APPLICATIONS ONLY
For exterior horizontal venting applications, the 2" X 1.5" reducer for 2" venting at the point where the exhaust pipe exits
the structure is not required in direct or nondirect vent applications in the Province of Ontario. In these applications, the
vent should be oriented such that the exhaust plume is unobjectionable. If the installation requires more separation be-
tween the flue gases and the building structure, a reducer may be installed on the exhaust pipe to increase the flue gas
velocity.
ADDENDUM FOR ALL PROVINCES OF CANADA
See below for venting for all provinces of Canada. Lennox approves the following termination for use in all provices of
Canada.
NOTE − Flue gas may be acidic and may adversely affect some building materials. If flue gases impinge
on the building materials, a corrosion−resistant shield should be used to protect the wall surface. The
shield should be constructed using wood, sheet metal or other suitable material. All seams, joints, cracks,
etc. in affected area, should be sealed using an appropriate sealant.
A − Clearance above grade or
average snow accumulation
B − Horizontal separation between
intake and exhaust
C − Exhaust pipe length
D − Wall support distance from top
of each pipe (intake/exhaust)
C
D
B
12"
A
2" (51MM)
Vent Pipe
12" (305 mm) Min. 12" (305 mm) Min.
6" (152 mm) Min.
6" (152 mm) Min.
24" (610 mm) Max.
24" (610 mm) Max.
Per: Saskatchewan Code of Practice
6" (152 mm) Max.
6" (152 mm) Max.
Page 66
3" (76MM)
Vent Pipe
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