I have a home in the Colorado moutains that was built in 1988 with 100% electric. Right now the home is 100% heated with baseboard heaters. I’m looking to switch to the primary heat source being ductless mini-splits with hyper heat.

About the home

– around 3000 sq/f 2 story home
– No attic all vault ceilings (I was told my a home science company it was to help heat the home during the days as we get a lot of sun)
– around r35 insulation in the crawl space walls with baseboard heaters. So semi-conditioned as I keep those heaters at around 55F and they rarely go on.
– have a 8Kw solar setup on the roof
– temps in winter usually highs in the 20s (lots of sun) lows in -10 to -5.
– extreme cold is usually around -20ish
– house is around 9400 feet above sea level
– House feels well insulated, not sure the R values of the walls
– Not many air leaks as seen via a thermal camera.

I’m looking at a hyper-heat heat pumps. 1 48k and 2 36k BTU units. From reading they are around 80% efficient at this altitude and when you add days of -15 and -20 I’m worried they might not keep up.

Anyone have any experience with hyper-heat pumps at these altitudes. The benefit is it’s pretty dry so I’m hoping in really cold days they don’t ice up too often.

Thanks