MG2R Spec Sheet

11
All models are approved for both vertical and horizontal direct (2 pipe) venting applications.
See Vent Table below for specified sizes and allowable lengths.
Maximum Direct Vent, Dual Pipe Length (ft.)*
M7RL Inputs
(BTUH)
Inlet / Outlet
3 in. Diameter
Inlet / Outlet
2 in. Diameter
45,000 60 30
60,000 60 30
72,000 60 30
*NOTES:
1. Subtract 3.5 ft. for each additional 3" 90 degree elbow.
2. Two 45 degree elbows are equivalent to one 90 degree elbow.
3. One short radius elbow is equivalent to two long radius elbows
4. Do not include termination elbows in calculation of vent length
5. This table is applicable for elevations from sea level to 2,000 ft.
For higher elevations decrease vent pipe lengths by 8% per 1000 ft.
of altitude.
6. Only the listed pipe materials are approved for use with M7
condensing furnaces.
7. For Canadian applications, use ULC S636 approved material.
VENTING
Pipe Materials
ANSI/ASTM
Standard
Schedule 40PVC D1785
PVC-DWV D2665
SDR-21 & SDR-26 D2241
ABS-DWV D2661
Schedule 40 ABS F628
Foam / Cellular Core PVC F891