Bradford White EF Series Service Manual page 7

Balanced Direct Vent Systems
PVC, CPVC or ABS
Total length of intake piping and exhaust
piping added together must not exceed
"Maximum Combined Length"
Shown below
Maximum Combined Length (feet)
Model Number
EF60T125, EF100T150
EF60T150, EF100T199
EF60T199, EF100T250
EF100T300
Unbalanced Direct Vent Systems
Air intake CAN NOT exceed exhaust by
more than 30 feet
Notes:
1) Multiply the total number of 90° elbows (intake and exhaust) by 5 feet. Do not include the
termination fittings or 3" condensate elbow.
2) Multiply the total number of 45° elbows (intake and exhaust) by 2 ½ feet.
3) Add this to the total length of straight pipe - intake and exhaust.
4) The sum total of all elbows and straight pipe - intake and exhaust must not exceed maximum
lengths from tables above.
Example: EF100T199
A 3" Balanced Direct vent system has 30 feet of straight exhaust pipe and 30 feet of straight
intake pipe. It has 3- 90° elbows in the exhaust and 3- 90° elbows in the intake. It has 1- 45°
elbow in the exhaust and 1- 45° elbow in the intake.
Therefore:
6- 90° elbows x 5 feet = 30 feet.
2- 45° elbows x 2½ feet = 5 feet.
60 feet of straight pipe + 30 feet + 5 feet = 95 feet.
System is within "Maximum Combined Length" from table above.
Vent Tables
3" 4"
120' 170'
100' 150'
80' 130'
60' 110'
Specifications
Power Vented Systems
PVC, CPVC or ABS
Total length of exhaust piping must not
exceed "Maximum Vent Length"
Shown below
Maximum Vent Length (feet)
Model Number
EF60T125, EF100T150
EF60T150, EF100T199
EF60T199, EF100T250
EF100T300
3" 4"
120' 170'
100' 150'
80' 130'
60' 110'
Page 7
Page 7