The Homemade Heat Pump Manifesto

[AC_Hacker]

Originally Posted by MN Renovator

"MN Renovator's comment is not correct."

Model FM12R
KW of elec. heat 1.7kw
8.9amps*230v=2047 watts

Are you sure? The numbers don't seem to add up but they aren't putting in the BTUs of heating either but 1700watts of heat output would be 5800BTU. If it produced the same amount of heat as it would cold, it would be a COP of a little over 2 but they aren't claiming that anywhere.

Yes, I am sure.

The model you choose is an air conditioner only and uses an electric resistance element as it's heat source.

Your chosen model has a 1700 watt resistance heater and at 115v the element would draw 14.78 amps.

Your chosen model uses 17.7 amps total when heating.

That would leave 2.92 amps to do something else with... I bet that is to power the fan... don't you think?

If you look further down the chart you will see that some model's cooling current use is much closer to the heating current use which indicates that the compressor is operating in heat pump mode and also notice that being figured into heating amps is current draw when BOTH the heat pump AND resistant heat is being used simultaneously.

-AC_Hacker