I getting ready to install a Hybrid Heat pump water heater in a 700 sq ft unconditioned basement next to the geothermal HP. Colorado has minimal humidity and the ambient room temp (summer) is 60 - 70. The HP WH will pull heat and any humidity from the air and return cold air. There's no air exchanger unit/capacity in the room (below ground - no windows). AHRI Standard 320-1998.pdf - references air temperature around geothermal hp units as different cooling vs heating, which I don't really understand for Geo-HP efficiency. What impact could the cold air have on the Geothermal HP in winter months? I'd think it beneficial in the summer if loop temps rise. Anyone have experience they can share?