Lennox MERIT Series Installation Instructions Manual page 50

Addendum For All Provinces Of Canada
See FIGURE 57 for venting for all province of Canada.
Lennox approves the following termination for use in all
provinces 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)
For The Province Of Ontario, Horizontal Sidevent
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 ap-
plications, the vent should be oriented such that the ex-
haust plume is unobjectionable. If the installation requires
more separation between the flue gases and the building
structure, a reducer may be installed on the exhaust pipe
to increase the flue gas velocity.
C
D
B
12"
A
2" (51MM)
Vent Pipe
12" (305 mm) Min. 12" (305 mm) Min.
6" (152 mm) Min.
24" (610 mm) Max.
Per: Saskatchewan Code of Practice
6" (152 mm) Max.
FIGURE 57
Page 50
3" (76MM)
Vent Pipe
6" (152 mm) Min.
24" (610 mm) Max.
6" (152 mm) Max.