Pair two thermostats to work with a single zone system


I have a southern California two-story home built in the late '70s. It's a single-zone system with both heating and cooling. The thermostat is located downstairs. In the summer the upstairs gets too hot and in winter the downstairs is too cold.

I'd like to put a wireless second thermostat upstairs and pair it with the hard-wired one downstairs. That way the system can tell the actual max./min. of the house temperature.

Are there any thermostats out there to do this? Would it even work?

Best Answer

What you actually need is a single thermostat that has support for one or more secondary remote thermometers. I believe the Honeywell TB8220U1003 supports this via this part:

Remote Thermometer

As a side note, it is often necessary to properly balance your HVAC system depending on the season by adjusting the dampers to increase/reduce the airflow to certain areas based on the season. Also remember to open your cold air returns in the winter. You might not need a different thermostat at all!