Can you use a two stage pro 5000 honey well thermostat? The unit will be your 3 ton 16 SEER two stage.

Honeywell's FocusPro 5000 (model number TH5220D1029) is a 2 Heat and 2 Cooling thermostat, so yes it will work with the heat pump system.

If you have any further questions, please call us and we will be happy to assist you.