Residential zoning can be accomplished in one of two ways: multiple, independent systems or a single system with motorized dampers in the ductwork to control where the conditioned air is going. In our previous custom home (before moving to The Villages), we had a single system with 4 zones. In the home before that, we had multiple, independent systems. There are pros and cons to each approach.
In order to do it correctly with a single system with dampers in the ductwork, you really want to choose a system that is designed for zoning such as the Carrier Infinity. The ductwork needs to be carefully designed to accommodate the minimum CFM that the system can deliver when only a single zone is calling. It will work best with a variable speed compressor and variable speed air handler that can ramp down when only a single zone is calling. The Villages has provided zoning in some of the larger homes via the first option: 2 independent systems.
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Originally Posted by boxcarwilly
How do you zone with central air...? Shutting off registers is not recommended for single speed units.
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