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Fred.
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Eddie C. Frincillo
An aquantance has a gas water heater in a crawlspace. Vent pipe passes thru exterior wall, runs up the wall outside with about a six inch standoff and terminates about a foot underneath the roof soffit. Should/can the vent be extended? If so, can it be offset with 45 deg ells & run above the roof, or would it be better to penetrate the soffit & roof?
Help would be appreciated.
Fred
» This message has been edited by Fred on 13 April 2006
» This message has been edited by Fred on 13 April 2006
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I cannot tell where you are from so with that in mind I will answer your question as if you were in either Australia or New Zealand where our regulations are very similar to each other. Here a flue vent is required to terminate 500mm above the roof line and unless it is fitted with a balanced flue or other special terminal it is not permitted to terminate a gas flue under a building soffit. By terminating a flue under the soffit and against an external wall ( given it is stood out by 150mm or 6 inches – in a prevailing wind a downdraught situation could very easily ocurr causing the water heater burner to baffle or otherwise create a situation where excessive amounts of carbon monoxide could be generated as a direct result of a poorly acting flue connected to a gas burner. Personally I would extend the flue via 2 45 degree bends and take it up above the roof hight to prevent the problem from ocurring in the first place.
Selgas Services Ltd
Craftsman Gasfitters, Plumbers, Electrical Service Technicians -
Thanks, Peter! Good info. I am in Tennesse, USA.
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Fred
Happy to be of help and hey might just look ya up on my next visit to them thar Southern States of yers.
Selgas Services Ltd
Craftsman Gasfitters, Plumbers, Electrical Service Technicians -
Peter,
When in Nashville, give me a “holler.”
Fred
» This message has been edited by Fred on 15 April 2006
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