I currently have electric resistance heating throughout my 2400 square foot ranch home, with individual thermostats in each room. I also have 2 central air units that are 20 years old. I live in the Northeast and electric heat is very expensive in winter. I am looking at a complete replacement of my AC units with a multi-stage heat pump, and am concerned about several things; the upfront costs, the practicality of using a heat pump below 30 degrees fahrenheit and the sizing of the heat pump. I have been told sizing of any unit is based upon how much loss due to heating or cooling is experienced; not the size of the area multiplied by 600 to determine the number of BTUs.
Does anyone have experience with calculating the size of a heat pump to heat and cool my home and any experience with a Hallowell Acadia Multi-Stage Heat Pump in a cold climate?
Thanks for your help.