Gas Water Heater Installation
30
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Venting:
Allowable 3" Venting
MODEL
MAX
LENGTH
MAX # of
ELBOWS
EQUIVALENT LENGTHS
180
100
’
6
Reduce the maximum vent length
accordingly for each elbow used:
Each 90˚elbow equates to 5 linear feet of vent.
Each 45˚elbow equates to 2 linear feet of vent.
210
100’
6
240
100’
6
NOTE: The maximum lengths listed above are for the exhaust pipe section
only. The intake air pipe length can be of equal length. The Maximum Length
are not including elbows.
Allowable 2" Venting
The 2
"
diameter Sch 40 PVC venting pipe installation is a maximum 12 feet,
plus 1 elbow and elbow termination (2 elbows total) up to 2,000 feet elevation.
Installations above 2,000 feet require all 3
"
venting.
MODEL
MAX LENGTH
MAX # OF ELBOWS
REMARK
180
12'
2
Type BH Special gas Vent
Class IIA(PVC) for Canada
210
12'
2
240
12'
2
VENTING
