I don't want to unhinge this thread. But I have a friend with a natural gas boiler who would like to go more electricity oriented as she also has solar panels. The house is well insulated and while not PassiveHaus, pretty well sealed.
As a first step, upgrading the radiator panels:
Could increasing the size of her radiator panels (she has the "US as a high-tech premium heat radiator" shown in AC_Hackers post) help her use her hot water more efficiently? What about using the Jaga style?
As a second step: replacing the gas boiler
She also has 2 large heated floor arrays (one per home level). Would ASHP be a suitable upgrade from natural gas?
I know, I know. Many variables unanswered. But if one was to speculate ...
GSHP is not an option. The house is built on granite.
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