So you want to A/C with loop water
Techshop
Tried it. Didn't work very well. The HX temp of 45 Deg. F isn't cold enough to remove humidity to make you feel comfortable. The room will have slightly lower temp., intern the air gets closer to the dew point and we start to feel uncomfortable.
You require a colder evaporator to wring the humidity out and feel comfortable. Stick with the heat-pump air-conditioner. They work so well in the summer.!!!
Notice the frost on the tube of my air handler. This is in my well insulated shop with machines producing heat. The Geothermal HP is awesome. AND I don't notice the extra cost on the electric bill. It is cheap to operate.!!
Randen
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