If your heater needs a line voltage thermostat then yes.
Hi Mike, It does not matter what wire you connect to the heater and what wire you connect to power for the Cadet TH401 Thermostat.
This thermostat can be set at 40 to 85 degrees.
Hello, thank you for your question! If your hot water baseboard uses 120 or 240 volts and is under 10.4 amps then yes you could.
Hello, thank you for your question! This is a line voltage thermostat rated to handle 10.4 amps at 120/240 volts. If your William heater fits within these guidelines then this would work with your heater.
No. You can effectively turn it off by setting a low temperature target.
Hello, thank you for your question! Yes you can use this thermostat on two Cadet wall heaters as long as you don't overload the circuit breaker or the amp rating of 10.4 on the thermostat. You must wire this in parallel and not series.