Gas and Oil Home Heating Furnaces - How tall FAU Flue

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njarif
08-12-07, 05:58 AM
Hi

I have a FAU installed in my 2-story attic. The unit is upright and the length of the exhaust pipe to the roof line is 3 1/2 feet. The leght of the exhast pipe above the tile was 2 feet. Now the roofer has replaced the old externalpiece (2 footer) with just a "T" which is more or less couple of inches above the roof tile. Is this a problem?

Thanks
Neil

Grady
08-12-07, 03:24 PM
The vent should terminate 2 feet above the roof. Is this some kind of metal liner inside a masonry chimney?
njarif
08-13-07, 08:28 AM
Hi Grady

Thanks for the reply. No this not a liner inside a masonary chimney. It is just metal. As I mentioned in my original post, the roofer placed a "T" just few inches above the roof tile and you mentioned two foot above roof line. Please confirm? also, should it be double lined?

Thanks

Neil

njarif
08-13-07, 10:33 AM
Hi Grady

Thanks for the reply. No this not a liner inside a masonary chimney. It is just metal flue. As I mentioned in my original post, the roofer placed a "T" flashing just few inches above the roof tile and you mentioned the need to be two feet above roof line even though this is just a flue for a gas unit sitting in the attic three feet below the roof. Please confirm?

Thanks

Neil
Grady
08-13-07, 07:09 PM
I believe all vents need to be at least two feet above the roof line. Check your local codes & the manufacturer's installation manual for the furnace.
Jay11J
08-13-07, 07:59 PM
Where is this "T" ?

Are you able to post us a picture of what you got?