Lennox MERIT Series Installation Instructions Manual page 13

Canadian Applications Only - Pipe, fittings, primer and solvent cement used to vent (exhaust) this appliance must be
certified to ULC S636 and supplied by a single manufacturer as part of an approved vent (exhaust) system. In addition,
the first three feet of vent pipe from the furnace flue collar must be accessible for inspection.
Vent Pipe
Input Size
Dia. in.
2
045 2-1/2
3
2
070 2-1/2
3
2
090 2-1/2
3
2
110 2-1/2
3
NOTE - Standard Terminations do not include any vent pipe or elbows external to the structure. Any vent pipe or elbows external to the structure must be included in total
vent length
calculations. See vent length tables.
* Kits must be properly installed according to kit instructions.
1Requires field-provided outdoor 1-1/2" exhaust accelerator.
2Concentric kits 71M80 and 44W92 include 1-1/2" outdoor accelerator, when used with 045 and 070 input models.
3 Flush mount kits 51W11 and 51W12 includes 1-1/2 in. outdoor exhaust accelerator, required when used with 045, 070 and 090 input models.
4 Termination kits 30G28, 44W92, 4493 and 81J20 are certified to ULC S636 for use in Canada only.
5 See table 10 for vent accelerator requirements.
OUTDOOR TERMINATION USAGE*
STANDARD
Wall Kit
Flush
Mount Kit
2 inch
51W11 22G44
(US) (US)
51W12 30G28
4
(CA) (CA)
YES YES
3
YES YES
3
YES YES
3
YES YES
3
YES YES
3
YES YES
3
YES
3
YES
3
YES
3
YES
YES
YES
TABLE 5
Wall Ring
Kit
3 inch 2 inch
44J40
Fabricated
(US)
15F74
81J20
4
(CA)
YES YES
1 1 5
YES YES
1 1 5
YES YES
1 1 5
YES YES
1 1 5
YES YES
1 1 5
YES YES
1 1 5
YES YES
5
YES YES
5
YES YES
5
YES YES
5
YES
5
YES
5
Page 13
CONCENTRIC
1-1.2 inch 2 inch
Field
71M80 69M29
(US) (US)
44W92 44W92
4 4
(CA) (CA)
YES YES
2
YES YES
2
YES YES
2
YES YES
2
YES YES
2
YES YES
2
YES YES
YES YES
YES YES
YES YES
YES YES
YES YES
3 inch
60L46 (US)
44W93 (CA)
4
YES
YES
YES
YES
YES
YES