Repair or Replace Heat-Pump Water Heater
I have a 7 year old GE heat pump water heater. 50 gallons. It probably can be repaired and GE even supplied a kit to boost the fan capacity. The unit is installed in the basement, which is separated by R30 insulation from the house. I do plan to add a short duct regardless of the unit I choose to move the exhaust air further from the unit. By moving the cold air output a few feet I think I can improve efficiency, but that is a side issue. The output would go into a “cold room” where I can store potatoes in the winter.
The main question is whether it it is now time to replace the unit instead of trying to make it work a few more years. Here are the numbers I am working with.
GE Geospring, operating in electric mode January to March, heat pump the rest of the year, compressor may be failing, purchased via MassSave program. Estimated COP for the unit is about 2.0 as the basement temperature ranges from around 52 degrees to 63 degrees during the month when the heat pump is used. This April I tried heat pump mode but it made me revert to electric resistance (I got an error code). I don’t know a tech who is experienced fixing these units.
Potential New Unit:
Probably a Rheem or AO Smith. Would go with 50 or 60 gallons. Would like to be able to run as a heat pump all year. I wonder if a COP of 3.0 or higher would be achieved all year round. I know that my situation in the summer when the basement is relatively warm and humid will be idea. In the winter the basement has some moisture but no mold and runs from 45 to 50 degrees. Cost of these units start at $1100 to $1200 and I don’t think I can get a rebate anymore.
Thanks for your help.
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