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Use PVC primer and solvent cement or ABS solvent cement
meeting ASTM specifications, refer to Table 4. As an alter-
nate, use all purpose cement, to bond ABS, PVC, or CPVC
pipe when using fittings and pipe made of the same materi-
als. Use transition solvent cement when bonding ABS to ei-
ther PVC or CPVC.
Low temperature solvent cement is recommended. Metal or
plastic strapping may be used for vent pipe hangers. Uni-
formly apply a liberal coat of PVC primer for PVC or use a
clean dry cloth for ABS to clean inside socket surface of fit-
ting and male end of pipe to depth of fitting socket.
Canadian Applications Only − Pipe, fittings, primer
and solvent cement used to vent (exhaust) this ap-
pliance must be certified to ULC S636 and supplied by a
single manufacturer as part of an approved vent (ex-
haust) system. When bonding the vent system to the fur-
nace, use ULC S636 approved One−Step Transition Ce-
ment to bond the pipe to the flue collar, or to bond the 90°
elbow or reducing 90° elbow to the flue collar. In addi-
tion, the first three feet of vent pipe from the furnace flue
collar must be accessible for inspection.
Table 5 lists the available exhaust termination kits, as well
as vent pipe equivalencies which must be used when siz-
ing vent pipe. All Lennox vent terminations are PVC.
TABLE 5
OUTDOOR TERMINATION KITS AND CORRESPONDING EQUIVALENCIES
UNIT
MODEL
VENT
PIPE
DIA.
(in.)
Vent Pipe Length Equivalency (feet)
Outdoor Ex-
haust Accel-
erator
(Dia. X
Length)
Outdoor Ex-
haust Accel-
erator
(Dia. X
Length)
1−1/2"
Concentric
Kit
2" Con-
centric Kit
3" Con-
centric Kit
2" Wall Plate
Kit
3" Wall Plate
Kit
2" Wall
Ring Kit
1−1/2" X 12"
2" X 12"
71M80
or 44W92
69M29
or 44W92
60L46
or 44W93
22G44
or 30G28
44J40
or 81J20
15F74
36B−045
2 4
Not
Allowed
12
Not
Allowed
Not
Allowed
4 4* 4
2−1/2 5
Not
Allowed
15
Not
Allowed
Not
Allowed
5 5* 5
3 7
Not
Allowed
21
Not
Allowed
Not
Allowed
7 7* 7
4 14
Not
Allowed
42
Not
Allowed
Not
Allowed
14 14* 14
36B−070
36B−071
2 4
Not
Allowed
12
Not
Allowed
Not
Allowed
4 4* 4
2−1/2 5
Not
Allowed
15
Not
Allowed
Not
Allowed
5 5* 5
3 8
Not
Allowed
24
Not
Allowed
Not
Allowed
8 8* 8
4 14
Not
Allowed
42
Not
Allowed
Not
Allowed
14 14* 14
48C−090
60C−090
60C−091
2
Not
Allowed
1
Not
Allowed
3 3
Not
Allowed
1 1**
2−1/2
Not
Allowed
2
Not
Allowed
6 6
Not
Allowed
2 2**
3
Not
Allowed
2
Not
Allowed
6 6
Not
Allowed
2 2**
4
Not
Allowed
4
Not
Allowed
12 12
Not
Allowed
4 4**
48C−110
60C−110
60C−111
2−1/2
Not
Allowed
2
Not
Allowed
6 6
Not
Allowed
2 2
3
Not
Allowed
2
Not
Allowed
6 6
Not
Allowed
2 2
4
Not
Allowed
4
Not
Allowed
12 12
Not
Allowed
4 4
60D−135
3
Not
Allowed
6
Not
Allowed
Not
Allowed
15
Not
Allowed
6
Not
Allowed
4
Not
Allowed
10
Not
Allowed
Not
Allowed
25
Not
Allowed
10
Not
Allowed
*Requires field−provided and installed 1−1/2" exhaust accelerator.
**Requires field−provided and installed 2" exhaust accelerator.
Termination kits 44W92 (includes 1−1/2" reducer), 44W93,
30G28 and 81J20 approved for use in Canadian installations.