On 12/11/2020 16:47, harry wrote:
On Wednesday, 11 November 2020 15:34:30 UTC, williamwright wrote:
Anyone had any experience of this?

A couple of houses round here have it.
Well insulated and underfloor heating.
Supplementary immersion heater for hot water.

Some have supplementary resistance heating for the house.
A lot depends on what refrigerant gas they use.

Can't there be a primary heat pump to heat a tank of water, and a
secondary one to take the heat from the tank and ramp it up to a high
enough temperature for standard radiators and hot water for baths &c.?

--
Max Demian