We thought we'd have it made with this new system. We've been told that the heating and A/C will respond to whichever zone has the greatest need (heaviest call on the system). So, it should be possible to let my parents' suite heat up in the morning and then air conditioning start cooling the rest of the house as the sun starts heating rooms up. The good news is that the house seems nicely cool in these recent 90- and near-90-degree days, and, hurrah! guests are finding the upstairs truly comfortable. But the dampers to my parents' zone are certainly not closing tightly as I believed they would and should. The air conditioning leaks - gently, but constantly - out their registers, so that they are not protected from the cooling. I'd like to hear from others who have zoned their houses (with a single furnace, heat pump and A/C unit, rather than completely separate systems). Do your zones close off tightly? Do we just accept the leaking air flows, or was it a bad installation?
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