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One Thermostat To Heat With Heat Pump or Boiler?
My question is whether there is any thermostat or controller that I could connect both my Daikin Heat Pump (3MXS24JVJU) and oil fired boiler to that would choose one or the other based on outside temperature.
We have a two zone hydronic baseboard oil fired boiler that uses the standard Honeywell 24v zone valves. The Daikin has two wall units within one zone, and a third wall unit in the second zone. (1400 sq/ft cape)
We'd like a controller that would switch, within each zone, from the heat pump at between 20 to 25 degrees F outside temperature, over to the oil fired heat when it get's below that. If the outside temperature rises above 25 degrees F, it would switch back to the heat pump.
We already do this manually and have saved a bundle of money over strictly heating with oil. Usually, though, by mid December, January and February, we just go with oil only. But, here in CT, even in January, the temperature often rises above 25, and could save even more if it would automatically switch between both systems. A true hybrid heating system.