husky10101
Well-known member
New construction with spray foam insulation. Can't get much better than that.
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Not the same. The new “vapor injection” heat pumps (as on ‘24 Lightning, not used on most home units) perform better at very cold temps than conventional heat pumps. Google “vapor injection heat pump.”Home heat pumps can cool and heat but not efficient in the cold so the home also has a normal furnace as a backup. Assume vehicle HP's are the same.
But there is no “free lunch”. Just optimized to reduce equipment size. We did similar liquid injection 30 years ago in chemical plants. With 15,000 bhp motor driven screw compressors. It works. The question always was how to simplify and keep capital costs down.Not the same. The new “vapor injection” heat pumps (as on ‘24 Lightning, not used on most home units) perform better at very cold temps than conventional heat pumps. Google “vapor injection heat pump.”
Why would that be? I don't know how to calculate heat loss for a moving vehicle, but for residential applications, cold-climate or "hyper heat" vapor injection heat pumps have about 1.3X the max (not "rated") heating vs cooling output compared to cooling-only models. In my climate, with a cooling design day around 90F, you're right that's still more cooling than is needed, but it's not 4X as much, and there are a lot of places in North America where it's much hotter than here.It makes sense that it would.
That’s going to be a pretty big unit. It’ll need to be 4x the capacity of just an air conditioner.
Thanks will have to look into Vapor HP. First I heard of theseNot the same. The new “vapor injection” heat pumps (as on ‘24 Lightning, not used on most home units) perform better at very cold temps than conventional heat pumps. Google “vapor injection heat pump.”
worth itIf I were buying today in Minnesota, I’d spend a bit more to get the ‘24.