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A way to temper geotherm loop
We have a job that has five geothermal heat pumps.The units currently have no supplemental electric heaters.The issue is when the temperature gets cold outside the loop temperature goes down as well.I was there today, and the water entering the units was 47 degrees.With this low of water temperature we get supply air temperatures in the mid to high 80's.My question is does anyone know the best way to temper the loop temperature so there would be higher water temperatures entering the units.Either with a supplemental boiler, and heat exchanger or other means.The entire system is about ten years old,Our company did not install it so I do not know if it is a vertical,or horizontal loop.The house does have natural gas, and the homeowner would rather not install electric heaters in the units.Thanks to all.