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> I hope something like a radiator-heat-pump can be made soon. These exist, but are quite rare in the U.S. Check out air-to-water heat pumps from Sanden[1] and
by lh7777 5y ago
> I hope something like a radiator-heat-pump can be made soon.
These exist, but are quite rare in the U.S. Check out air-to-water heat pumps from Sanden[1] and Chiltrix[2]. I seriously considered this for my new house (still in planning stages), but at double the cost of an air-to-water heat pump system it didn't make the cut. If they were more common, the cost would come down, but I think it's a chicken/egg thing at this point.
Of course, water-to-water (geothermal) heat pumps have been in the States for decades, and if I recall there are still federal tax credits available for them, but they're even more expensive and probably only make sense in very cold climates.
[1] https://www.smallplanetsupply.com/sanco2-for-combi-systems https://www.smallplanetsupply.com/sanco2-for-combi-systems
[2] https://www.chiltrix.com/air-to-water/ https://www.chiltrix.com/air-to-water/
- jabl 5y agoOver here air-water heat pumps have become quite popular for replacing old oil boilers, as you can keep using the existing water pipes and radiators. I don't think they're that common in new construction. My father recently did exactly that, installing a unit by Mitsubishi. IIRC it has a COP of 2 at -15C, finally switching to resistive heating at -25C or so (which is somewhat unusual, maybe a few days or a week per year over here). He also has his old wood boiler as backup that he uses when it gets cold (it was a dual oil/wood boiler, though the oil burner and oil tank was ripped out as part of the retrofit).