Specification

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* NOTE:
1. Subtract 2.5 ft. for each additional 2" elbow and 3.5 ft. for each additional 3" 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 2000 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 KG7 Condensing Furnaces.
VENT TABLE
VENTING
All models are approved for vertical non direct (1 pipe) and direct (2 pipe) venting applications. See Vent Table below for
specified sizes and allowable lengths.
SINGLE PIPE LENGTH (FT.)
with 1 long radius elbow*
DIRECT VENT,
DUEL PIPE LENGTH (ft.) WITH
1 long radius elbow on each pipe*
OUTLET OUTLET INLET/OUTLET INLET/OUTLET
MODELS 2” 3” 2” 3”
SD038 50 70 50 70
SD054 70 90 70 90
SD072 50 90 50 90
SD090 60 90 60 90
SD108 N/A 90 N/A 90
SD120 N/A 90 N/A 90
SM054 70 90 70 90
SM072 50 90 50 90
SM090 60 90 60 90
SM118 N/A 90 N/A 90