Lennox MERIT Series Installation Instructions Manual page 14

Vent Pipe
Input Size
Dia. in.
2
045 2-1/2
3
2
070 2-1/2
3
2
090 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
Flush Mount
Wall Kit
Kit
2 inch
51W11 (US)
22G44 (US)
51W12 (CA)
430G28
(CA)
YES
3 YES
YES
3 YES
YES
3 YES
3YES YES
3 YES YES
YES
3 YES
3 YES
N/A
3 YES
3 YES
TABLE 5
3 inch Field
Fabricated
44J40 (US)
481J20 (CA)
1 YES 5 YES
1 YES 5 YES
1 YES 5 YES
1 YES 5 YES
1 YES 5 YES
1 YES 5 YES
YES
5 YES
YES
5 YES
YES 5 YES
Page 14
CONCENTRIC
1-1/2 inch 2 inch
71M80 (US) 69M29 (US)
444W92 444W92
(CA) (CA)
2 YES
2 YES
2 YES
N/A
2 YES
2 YES
2 YES
YES
N/A YES
YES
3 inch
60L46 (US)
444W93
(CA)
N/A
YES
YES
YES