2 zone hvac system


Old 07-24-01, 05:32 PM
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Should a 2 zone hvac system use the same return air duct or should they be separate?
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Old 07-26-01, 09:52 PM
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Most likely the same return duct is used, but it realy depends on the design of the system.
Old 07-27-01, 02:21 PM
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My single unit, dual zone (upstairs/downstairs) HVAC system uses the same return ductwork, but has separate damper-controlled supplies, of course.
Works fine. I suppose the returns could be separate, too, as long as it ended back up returning to the unit.
Probably less expensive to have a common return.

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