Thread: Water heater venting
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Old 06-13-2008, 09:44 AM
Dana Bostick's Avatar
Dana Bostick Dana Bostick is offline
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Location: SoCal
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Re: Water heater venting
Quote:
Originally Posted by Greg Frazier View Post
I inspected a house with an unlined chimney with two separate flues. Each flue had a cleanout door. The water heater vented into the left flue and was backdrafting badly. The vent connector rise was less than 6 inches as required by the manufactures installation manual. Whirlpool manual says "CAUTION VENT CONNECTORS MAY NOT TERMINATE WITHIN A CHIMNEY
FLUE SERVING A FIREPLACE UNLESS THE FLUE OPENING IS PERMANENTLY SEALED." Does this mean the cleanout door must be sealed as well as the chimney opening where the vent connector enters? By the way, the cleanout door can't be sealed right now anyway. It is propped open by a gas line tapped from the water heater going up to a gas log. There were other problems as well.
It's always been my understanding the gas appliances should not ever be vented into unlined chimney flues due to the fact that the exhaust from them contains a lot of moisture which, in combination with the soot etc., can become acidic and deteriorate the chimney and mortar.
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