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Registered
Join Date: Mar 2003
Location: SW Cheese Country
Posts: 13,615
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Our geothermal heat pump switches automatically if it can't keep up. At -20* it still runs the normal pump and the temp out the vents is 90*.
You shouldn't have to worry about switching it.
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Brent
The X15 was the only aircraft I flew where I was glad the engine quit. - Milt Thompson.
"Don't get so caught up in your right to dissent that you forget your obligation to contribute." Mrs. James to her son Chappie.
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