Questions tagged [b-vent]

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how much 3 inch B-vent (double wall) for water heater can be above the roof?

The natural gas venting tables talk about lateral versus vertical rise and pipe diameter, plus the 2 and 10 ft rule for height above the roofline and outdoor vertical walls but they never mention how ...
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Serious corrosion of vent connector duct in gas hot water system

I have a combined radiant heating system/domestic hot water system. This unit is a middle efficiency unit rated at 87% The boiler is connected to a B-vent chimney with single wall vent connector. ...