I'm finalizing the parts list for my upcoming HTP UTF80 mod-con install.
I'd rather go with 2" Schedule 40 PVC for the intake and exhaust piping vs. 3" PVC because it would make installation and routing easier if possible.
My exhaust and intake pipes would exit the boiler, go about 1' straight up to a 90o elbow then 4' straight to the outside wall of the basement to a no other elbows, 45's, etc.
Total combined straight pipe run for intake and exhaust: 10'
Total 90o elbows: 2 (one in/one out)
According to the HTP UTF80 install manual -you don't include the first elbow in the piping length calculations.
Here's a section of the official HTP UTF80 install manual regarding piping:
This boiler uses 2” or 3” diameter pipe for exhaust vent and intake pipe.
ALLOWED COMBINED VENT LENGTHS:
2” COMBINED VENT LENGTH- 50’
3” COMBINED VENT LENGTH- 100'
NOTE: When using more than 1 elbow, reduce maximum allowable length:
5 feet (1.5M) for each additional 3” 90o elbow
2.5 feet (.75M) for each additional 3” 45o elbow
8 feet (2.4M) for each additional 2” 90o elbow
4 feet (1.2M) for each additional 2” 45o elbow
So my question is.... is there any disadvantage in using 2" Schedule 40 PVC vs. using 3" Schedule 40 PVC for my install considering the short runs installed?
Any comments are appreciated... thanks!
I'd rather go with 2" Schedule 40 PVC for the intake and exhaust piping vs. 3" PVC because it would make installation and routing easier if possible.
My exhaust and intake pipes would exit the boiler, go about 1' straight up to a 90o elbow then 4' straight to the outside wall of the basement to a no other elbows, 45's, etc.
Total combined straight pipe run for intake and exhaust: 10'
Total 90o elbows: 2 (one in/one out)
According to the HTP UTF80 install manual -you don't include the first elbow in the piping length calculations.
Here's a section of the official HTP UTF80 install manual regarding piping:
This boiler uses 2” or 3” diameter pipe for exhaust vent and intake pipe.
ALLOWED COMBINED VENT LENGTHS:
2” COMBINED VENT LENGTH- 50’
3” COMBINED VENT LENGTH- 100'
NOTE: When using more than 1 elbow, reduce maximum allowable length:
5 feet (1.5M) for each additional 3” 90o elbow
2.5 feet (.75M) for each additional 3” 45o elbow
8 feet (2.4M) for each additional 2” 90o elbow
4 feet (1.2M) for each additional 2” 45o elbow
So my question is.... is there any disadvantage in using 2" Schedule 40 PVC vs. using 3" Schedule 40 PVC for my install considering the short runs installed?
Any comments are appreciated... thanks!
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