6 Heat Pump Myths 

The new inverter heat pumps make it possible to produce enough heat but the coefficient of performance drops in severe cold weather . Usually below 2

I have the same Mitsubishi VFR outdoor unit on my home here in Wisconsin. We went through a week long cold snap (-5 average ) and it kept up just fine but it ran my electric bill up about $125 more than I have ever paid since we built the house 17 years ago. So I am not sure that I am totally onboard the heat pump movement at this point yet. My contractor that installed the system said that they are installing these systems like crazy here in Wisconsin. Only time will tell.