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High-Efficiency Commercial Gas Series - Service Manual
VENTING TABLES
Maximum equivalent feet of intake air and vent pipe using 3" PVC is 50 feet (15.2m). Equivalent feet
must include any 90° elbows (two 45° elbows equal one 90° elbow). Three inch diameter 90° elbows
are equivalent to 5' (1.5m) of pipe.
Maximum equivalent feet of intake and vent pipe using 4" PVC is 120 feet (36.6m).
Equivalent feet must include any 90° elbows (two 45° elbows equal one 90° elbow). Four inch
diameter 90° elbows are equivalent to 5' (1.5m) of pipe.
Vent/Intake Air Pipe Equivalent Feet (Meters)
Number of 90°
Elbows
ONE (1)
TWO (2)
THREE (3)
FOUR (4)
FIVE (5)
SIX (6)
Technical Literature Department
3" Minimum
3" Maximum
Pipe (Ft./M.)
Pipe (Ft./M.)
7/2.1
7/2.1
7/2.1
7/2.1
7/2.1
7/2.1
Servicing should only be performed by a Qualified Service Agent
4"Maximum
Pipe (Ft./M.)
45/13.7
115/35
40/12.2
110/33.5
35/10.7
105/32
30/9.1
100/30.5
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95/29
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90/27.4
9
Ashland City, Tennessee © 2008
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