Vent Length Table For Variable Speed Vent Motor Models Only - American Standard 50A65-475 Manual

Vent Length Table for Variable Speed Vent Motor Models Only

Altitude
0 – 7,000 Feet
UX/ DX or UY/ DY060R9V3V
UX/ DX or UY/ DY080R9V3V
UX/ DX or UY/ DY100R9V4V
UX/ DX or UY/ DY120R9V5V
7,000 – 9,500 Feet
UX/ DX or UY/ DY060R9V3V
UX/ DX or UY/ DY080R9V3V
UX/ DX or UY/ DY100R9V4V
UX/ DX or UY/ DY120R9V5V
9,500 – 12,000 Feet
UX/ DX or UY/ DY060R9V3V
UX/ DX or UY/ DY080R9V3V
UX/ DX or UY/ DY100R9V4V
UX/ DX or UY/ DY120R9V5V
Notes:
First letter of models may be an "A" or "T" .
1. Minimum vent length for all models: 3' horizontal and vertical.
2. DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET
(except adapters at the top of the furnace).
3. MAXIMUM PIPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL,
IT IS THE MAXIMUM LENGTH OF EACH (vent or inlet air pipes).
4. One SHORT radius 90 elbow is equivalent to 10' of 3" pipe and one LONG radius elbow is equivalent to 6' of 3" pipe.
One 90 elbow is equivalent to 7.5' of 2-1/2" pipe and 5' of 2" pipe. Two 45 elbows equal one 90 elbow.
5. The termination tee or bend must be included in the total number of elbows. If the BAYVENT100A termination kit is used,
the equivalent length of pipe is 5 feet.
6. Pipe adapters are field supplied (except 120).
7. Low temperature icing on vent inlet or termination may cause pressure switch problems.
2 Inch Pipe
200
50
Not Allowed
Not Allowed
2 Inch Pipe
100
25
Not Allowed
Not Allowed
2 Inch Pipe
50
Not Allowed
Not Allowed
Not Allowed
See Installation Manuals of Other 90% Furnaces with
Standard Vent Motor for Their Vent Length Tables.
Maximum Total Equivalent Length in Feet
for Vent and Inlet Air (See Notes)
2.5 Inch Pipe
200
120
60
Not Allowed
2.5 Inch Pipe
100
60
30
Not Allowed
2.5 Inch Pipe
50
30
Not Allowed
Not Allowed
42
3 Inch Pipe
200
200
200
200
3 Inch Pipe
100
100
100
100
3 Inch Pipe
50
50
50
50