Review on Robertshaw ETC-112000-000 24VAC Line Voltage Thermostat by Omar Svagera

I connected this temperature sensor to my electric resistance heater for my heat pump. Post-heating is now available until the outdoor temperature falls below my setpoint. My heat pump can maintain an indoor temperature of 70F for any outdoor temperature above 10F. Before installing this temperature sensor, I had to manually turn on the backup heat source whenever I thought the outside temperature would drop below 10F during the night. My system is now fully automatic and saves energy by making optimal use of the heat pump.