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Old 06-24-2007, 11:14 AM   #1
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Water heater flue gas condensation problem?


I had this water heater installed in Oct '06. I noticed there's a bit of flue gas condensation on top of it and it's rusting there as well. Is this a problem or is this typical?


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Old 06-25-2007, 07:59 PM   #2
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Water heater flue gas condensation problem?


Is it possible that flue gas is escaping around the outside sleeve? I have to admit that I really don't know much about the anatomy of a water heater.

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Old 06-26-2007, 05:32 AM   #3
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Water heater flue gas condensation problem?


Wrong set up, the flue from the water heater is supposed to enter the chimney higher than the boiler flue. The way it is, on a warmer day the flue gases from the boiler will spill out when it fires up before you start to draft properly. Flue gases will follow the path of least resistence (ie spill out the draft hood). Also check the static (non-firing) draft pressure.
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Old 06-26-2007, 12:21 PM   #4
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Water heater flue gas condensation problem?


Are you saying there should be two flues entering the masonary chimney and they connect further up the chimney?
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Old 06-26-2007, 08:59 PM   #5
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Water heater flue gas condensation problem?


On a horizontal breeching such as yours, there should be two pipes entering the chimney, the smaller appliance being the higher connection. They don't need to have space in between them, one can sit directly on the other.
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