Heat pump insulation


Old 01-28-10, 11:48 AM
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Heat pump insulation

Recently bought a house with our first heat pump. I've been told they are not efficient in cold weather. The last cold spell it ran constantly. We are about to be hit again. I noticed on the condenser unit outside, there are two copper lines coming out of it. The line (about 1" diameter) is wrapped with a rubber insulation tube. The other line (about the 1/2" diameter) is not insulated. I see this line running across my attic to the air handler also. I was thinking this should be insulated. Is that right? If so, should I use a rubber pipe wrap or tube?
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Old 01-28-10, 02:11 PM
airman.1994's Avatar
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It's fine leave it like it is.
Old 01-28-10, 06:22 PM
Jarredsdad's Avatar
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The insulated line carries hot gas in the winter, insulation keeps it from loosing heat. This line also carries cold gas in the summer, insulation prevents condensation from forming and dripping water everywhere.

The small line always carrys liquid and is left bare coper.
Old 01-28-10, 06:44 PM
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There's still a lot of heat in the air in the winter.

Best thing for the heat pump is set the t-stat the temp you want it at, and forget it.. Don't use the program mode.
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