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Thanks for the answers. My installer and HVAC1000 agree on the bleeding and a by pass damper was installed, so I'll stop fretting.

I have a two zone A/C system just installed this summer. One zone upstairs/ one zone downstairs. When I only use one zone the other zone has air coming out of it
, not a lot but enough that the...

I purchased a condo (efficiency) that was converted from a motel. I 've had and have problems with hot water in taps. The unit is old and the feed pipes from the hot/cold water supplies are not...