A plurality of home and commercial heating in the US involves direct burning of fossil fuels. So even if the grid is 100% renewables, you’re talking about spending thousands of dollars per house to replace oil and gas furnaces with heat pumps.
A rapid transition would be hellishly expensive, but new installations can certainly be looking at heat pumps.
I wonder if there is a way to structure penalties/incentives so that home builders and landlords end up installing systems with lower lifetime costs (and lower environmental impact), rather than whatever is cheapest upfront.
Is the first statement just about transport?