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Insulating gas furnace warm air vent

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Insulating gas furnace warm air vent traveller2k 02-12-2007
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Posted by danger@heat.com on February 13, 2007, 6:20 pm
I still see alot of insulated flue pipes. Carrier has a mid vented with cvent
to the liner. They put an insulated aluminum jacket around the cvent. I have
started pulling alot of them off since discovering rust and corrosion at the
vent connector. I see alot of cracked cells in carriers now, this is what led
me to find the rotted flue pipe. New installs use bvent now, and even the
latest cvent is no longer insulated. If you want to save money ditch the 80%
and get a high efficiency. Insulating the flue pipe isn't a good idea.

-Canadian Heat


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Posted by Oscar_Lives on February 13, 2007, 6:50 pm

> Hi,
>
> my gas furnace sits in the laundry room in the basement and there is a
> lot of heat that comes off the pipe the sends the hot air up into the
> house. I went to HD and asked about wrapping some form of insulation
> around the pipe. I was first told to use batting wrapped in plastic.
> Thought this was not going to work given the amount of heat that comes
> off the pipe. Of course I wasted money on that after seeing the
> batting turn brown and fall off the pipe (had it taped on with heat
> resistent tape). Went back and someone else provided me with a foil
> wrap that sandwiches bubble wrap - I think it had an R rating of 4.
> Went on easily but as soon as the furnace kicked on, the bubble wrap
> shrunk and is now just a piece of foil wrapped around the piping. Im
> starting to think this isnt meant to be. I have only found stuff
> online that talks about insulating the heating ducts but nothing that
> provides any info on insulating the actual pipe that comes out of the
> top of the furnace. Is there such a thing?
>
> Thanks.
>
> Traveller


Call a pro before you blow yourself up (or burn yourself down).



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