My home has a geothermal heatpump that is about 2.5 years old. The
heat pump cannot keep up when it gets too hot out. I live in
Tennessee, and the temperature was in the high 80s and low 90s for
significant portions of this past summer. During those times, my whole
house heats up to around 6-8 degrees higher than I've got the
thermostat set, and the heat pump runs constantly. Needless to say,
this jacks up my power bills, and that kind of defeats the purpose of
having the geothermal heatpump in the first place.
I've talked with the contractor that installed the heat pump, and they
insist that it is the right size for my house. But they say that it
just won't be able to keep up when it gets that hot. honestly, this
seems like BS to me, it seems to me that either the heat pump can keep
up, or it is undersized.
Anyway, I wonder if anybody has suggestions for how to improve the
situation. Is there any kind of supplemental system that can be used
with a geothermal heat pump, something along the lines of the aux heat
coils that standard heat pumps use when it gets too cold?