We encapsulated the crawlspace, although I think it needs some more QC still. We plan to put an addition behind it, which I think will actually lower the overall load. Our last house had an amazing shell. Life is funny.

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Ironically, our current house has by far the worst shell of anything we’ve owned in the past, including an 1835 house lol So I actually need the resistance below 15 or 20 Fahrenheit. It’s a manufactured home, so there’s almost no retrofit opportunities

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I get where you’re coming from. Personal story this morning, though, my heat pump decided to kick off again. I think it has a refrigerant leak, but we have a very cold week coming, so I’m not gonna go figure all that out right now. I at least have the resistance to turn on in the meantime.

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And look at the manual for if its a hard cutoff. That creates a very nom-linear risk profile.

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You're right to avoid the resistance backup. I would totally ignore the nominal rating and look for capacity at -23 °C only.

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