Sure, and they could shrug off the cost of installing a ground-source heat pump[1] too, which would be too expensive for more modest homes. But they'd again hav

Sure, and they could shrug off the cost of installing a ground-source heat pump[1] too, which would be too expensive for more modest homes. But they'd again have to give a damn, which I am only semi-optimistic about... 1: https://www.energy.gov/eere/articles/5-things-you-should-know-about-geothermal-heat-pumps https://www.energy.gov/eere/articles/5-things-you-should-kno...