The system when hooked up ran with no problems and more economically than I could believe. We monitor pressures, temperatures on the pump side and the city water side and the city water was almost a constant 45 degree F. The city water going through the exchanger and returning to the city main was running at 42 degrees F. We borrowed 3 degrees Farenheit from the city water to heat with. Jerry Heggestad, our electrician, calculated that we heated this 15,000 sq/ft building for $70-75.00. This is when we had more than a week of below zero temperatures and lot of it in the minus 20 degree F to minus 28 degree F range.

The ability to heat and cool is super nice. I am delighted about this system. This is 21st century heating and cooling. With units working the compressors only pull 8 amps.

Lately when it warmed up and we were air-conditioning, we were constantly adding 4 degrees to the city main. Next year when the ditches where we dug the lines from the city main into and out of the building have settled, we will do even better. . .the permafrost will not go so deep into the soil. The city water in the winter runs around 55 degrees Farenheit giving us a plus 10 degree F going into the exchanger. We have passed all city and state water quality testing since operating the units.