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power vent design
TomM
Posts: 233
in Gas Heating
Question on exhaust design:
-
If an appliance has a 6" exhaust, and you are using a 4" power vent, which is better:
-
1) bush down the exhaust pipe immediately to 4" and use a 4" barometric
OR
2) use a 6" barometric and 6" exhaust pipe until you get close to the power vent, and then bush down to 4"
-
Which is better, and why?
-
(disclaimer - i am NOT building my own exhaust, but the contractors i've spoken to say to use 6" as far as possible, but can't explain why)
Thanks!
-
If an appliance has a 6" exhaust, and you are using a 4" power vent, which is better:
-
1) bush down the exhaust pipe immediately to 4" and use a 4" barometric
OR
2) use a 6" barometric and 6" exhaust pipe until you get close to the power vent, and then bush down to 4"
-
Which is better, and why?
-
(disclaimer - i am NOT building my own exhaust, but the contractors i've spoken to say to use 6" as far as possible, but can't explain why)
Thanks!
There was an error rendering this rich post.
0
Comments
-
Power Venters:
You go with the larger pipe for the "Plenum Effect". The "Plenum Effect" slows the velocity of the gasses.
It's like those steam boiler headers. If you have a single 1 1/2" riser coming off the boiler into the system, you could have incredible velocity. But if you ran two, 2" risers out of the boiler, the same amount of steam will be traveling slower, and have less surface area to cause resistance.
IMO0 -
ice
thanks man!There was an error rendering this rich post.
0
This discussion has been closed.
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