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Old 09-21-2012, 10:36 AM   #1
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high efficiency furnace venting


I am just wondering if I can or should use the CPVC that Home Depot sells to vent (and supply combstion air) to my new furnace or listen to my wholesale guy. I forgot the name of the pipe he is trying to sell. They are both the same price practically but H.D. is handier. Thnx for your help.


Last edited by Dave Purych; 09-21-2012 at 10:40 AM.
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Old 09-21-2012, 11:53 AM   #2
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high efficiency furnace venting


The answer is no.I don't know the exact reason but I have never seen CPVC reccomended for venting purposes by the manufacturer.There must be a reason.My guess is that the heat and acid in the exhaust will cause the CPVC to get brittle and crack.

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Old 09-22-2012, 09:06 AM   #3
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high efficiency furnace venting


PVC or ABS is fine.

CPVC ID size is not the same as PVC. So you would need to use 2.5" CPVC when 2" PVC is what is called for.
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Old 09-22-2012, 01:55 PM   #4
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high efficiency furnace venting


I don't know where you're located, but in Canada it has to be S636 PVC venting. If you can and do use ABS, don't use cellular core.
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Old 09-22-2012, 03:40 PM   #5
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high efficiency furnace venting


I'm in the states. I think the poster may be in Canada, so thanks for that info.
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Old 09-22-2012, 10:11 PM   #6
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Quote:
Originally Posted by Dave Purych View Post
I am just wondering if I can or should use the CPVC that Home Depot sells to vent (and supply combstion air) to my new furnace or listen to my wholesale guy. I forgot the name of the pipe he is trying to sell. They are both the same price practically but H.D. is handier. Thnx for your help.
no use pvc or abs....

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