I have and old gravity furnace. The existing thermostat only has two wires. The heater does not have a fan. Will this work with my heater?

ecobee3 Smart Wi-Fi Thermostat

ecobee3 Smart Wi-Fi Thermostat

Product No Longer Available

1 Answer from the Community

  • The best way to know is contact ecobee directly. Any unusual or old furnaces, they should be able to determine compatibility.