After doing mainly large commercial work we're now getting into some larger residential projects. I'm looking for some input on residential zoning systems. In the past I've stayed away from them thinking they were problematic. I'd now like to give them some more consideration. I'm wondering if anyone can provide input on brands and how they interface with a two stage heat pumps and ECM fan motors. I once heard someone say that a bypass is not needed with an ECM motor. I'm not sure I believe it. I also question whether the bypass should be a barometric damper or a motorized damper.
Any input would be appreciated.