Hot water heat with geothermal heat pump
I am in Grand Rapids, MI and just finished building (several months ago) a pretty well insulated large home of 4300 square feet and HERS index 43. We have 5 ton geothermal heat pump and radiant floor in basement floor and master bath on second floor. We have a desuperheater hooked up to two powered electric hot water tanks. Initially the first tank was not to be powered, but at last minute they decided we needed more hot water with the floors and powered both. It’s been not surprisingly a disaster from an energy efficiency standpoint with more than half the electric bill going to hot water. We have also had the system just break for the third time. The HVAC company wants to replace one tank with a standard 75 gallon gas powered tank. We do have natural gas to the house for the fireplace (don’t ask why), but I don’t really want a combustible appliance drawing from the home or another hole to the outside, but they say a hybrid heat pump water heater is not a good option because we have geothermal (although I suspect ours is oversized and can handle it) and they also say high efficiency gas is not a good idea with the floors and desuperheater. I would appreciate any advice.
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