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Old 05-15-2007, 07:59 PM
Jeff Eastman Jeff Eastman is offline
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Furnace vent
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Last edited by Jeff Eastman : 12-19-2007 at 04:31 PM.
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Old 05-15-2007, 10:53 PM
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Bob Harper Bob Harper is offline
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Re: Furnace vent
Appears to be B-vent hacked open. Not approved by vent mfr. and thus codes. Should have spent the few extra bucks on a draft hood connector and not ruined a section of venting.

FYI, every single furnace I see has improper clearance to the PVC drain line.
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Old 05-15-2007, 10:56 PM
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Thom Walker Thom Walker is offline
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Re: Furnace vent
Bob,

Am I having another false memory moment or aren't evaporator coils above the heat exchangers soon to be discontinued?
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Old 05-16-2007, 06:56 AM
John Stephenson John Stephenson is offline
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Re: Furnace vent
Isn't it 1" clearance from b-vent to combustible or is there an exception for PVC?
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Old 05-16-2007, 07:48 AM
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Bob Harper Bob Harper is offline
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Re: Furnace vent
Where is there any B-vent within 1 inch of that PVC?

That's single walled pipe for about one foot so it's 6". The coil mfrs put the drain right in a place where it must pass within 6" of the appliance collar. I've seen them heat stressed and leaking.
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Old 05-16-2007, 08:19 AM
Jeff Eastman Jeff Eastman is offline
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Re: Furnace vent
Single wall pipe! Duuuuuuuuuuuuuuuuuuhhhhhhhhhhhhhhhh!!!


Is it allowed to mix single wall with double wall?
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Old 05-16-2007, 08:28 AM
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Michael Thomas Michael Thomas is offline
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Re: Furnace vent
"Single wall pipe"

Is it?

I appears to me that there is an interior pipe visible just above the furnace casing and also an exterior pipe which is fitting over (is the male end) of the connection with the B-Vent. What did the labeling on the left side of the pipe say? I'm not saying this is right, but it appears to be more complicated than just a single-wall segment between the and the start of the B-Vent.
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Old 05-16-2007, 06:52 PM
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Bob Harper Bob Harper is offline
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Re: Furnace vent
When you hack one end of B-vent off, it become single walled vent connector.
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