Thank you for contacting us with regards to our Aprilaire Thermostats. We have several models that can be used with heat pump systems. Models 8465 and 8466 are programmable models and 8446 and 8448 are non-programmable models. Models 8570 and 8600 can be converted to programmable or non-programmable models. Other options you may need to consider are whether your heat pump has a single or multi-stage compressor and what type of auxiliary heating system will be used, if any. The zoning system you choose should match your heat pump options so that the thermostat has the correct interface. For example, if your heat pump has a 2-stage compressor, your zoning system should be able to work with that system and the thermostat should match.
We appreciate the opportunity to be of assistance.
Looking for thermostate to use with zoning system on a Geothermal Heat Pump System.