# Heat pump in basement?

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• posted on October 25, 2012, 2:06 pm

Another way of looking at this might be to figure out how many tons or BTUS those heat pumps would be. I don't know heat pump ratings, but they are going to have to be in the range to heat a house. So for those 4 small condos in DC, let's say the total capacity needed is 100,000 BTUs. A typical window AC unit is 6,000. So, when you're using the heat pump to heat the house, it's like having 17 window AC units pumping cold air into the basement. It doesn't sound like it would take very long for that to drop the temperature way down. And the lower the temp, the less efficient the heat pump is, the less heat you get out, etc. In the summer, you would have the reverse, with the equivalent of 17 window AC units pumping their heat into the basement.
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• posted on October 25, 2012, 11:15 pm

No, but I'll see if I can find out and post back. Some of the wells are supply and the others are return and which is which depends upon the water temperature as well as what mode the heat pump is in (heat or cool).
Tomsic
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• posted on October 26, 2012, 2:48 am
On 10/25/2012 6:15 PM, .-. wrote:

In the wells we use, the loop is one continuous circuit. There is no supply and return, each well has two pipes that are connected at the bottom of the well. When the pumps are running the water goes down one pipe and up the other to the next well. The HVAC units are either extracting the heat or the cool from the loop based on the thermostat requirements. If the well field is properly sized the circuit sheds heat into the well field strata during the summer or heats the loop in the winter. The idea is to provide close to a constant temperature in the loop that is much closer to the desired room temperature than the delta using outside air. It takes a lot more Btu's to heat a room using the outside air at 0* than to work with a 55* loop.
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