Dual fuel heating system – thermostat?
We recently built an addition onto our house and instead of extending our existing AC-only system, we installed a second AC/heat pump system. The house also has an oil-fired boiler with baseboards.
We added two heating zones to the addition onto the existing hydronic heating system, so the addition has two heat sources – oil and heat pump.
My question is this – is there a thermostat available that would only fire the boiler when it gets cold enough for the efficiency of the heat pump to drop below a certain rating? Here in western VA it often gets warm enough – like today it is 47F outside – that I believe the efficiency of the heat pump should exceed that of the boiler.
What I would like to have is a thermostat with an outdoor temperature sensor that allows me to use the heat pump when the temps are moderate, and the boiler when it drops below a certain temperature.
Thanks for any help you can provide!
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