Heat Pump Balance point higher when it is raining

Old 11-09-11, 08:01 AM
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Join Date: Jan 2008
Location: VA
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Heat Pump Balance point higher when it is raining

Not much to brag about here but my 10 Seer Goodman Heat Pump is good for keeping my old 1200-1400 sq foot house heated to 68 degrees on a clear night until the temperature falls to about 31 degrees. If it is raining, the heat pump can't keep up when it is 40 degrees out. Is this due to rain getting on the air handler? Just curious...thanks!
Old 11-09-11, 09:50 AM
Join Date: Feb 2010
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that makes sense. If its raining and the rain is 40 degrees, then the rain will pick up heat from the heat pump and throw it on the ground. Freon, when expanding from liquid to vapor picks up heat from the condenser and brings it inside to blow into your house. If the rain is taking the heat away from the condenser, then there is very little heat to bring inside, i think.
However, during the summer the operations are reversed. Heat is picked up inside and brought to the condenser where it is expelled in to the air. If its raining, heat will be removed from the condenser much quicker and make the air much colder. which is a good thing.

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