Idiots... What happens when the plumbing freezes and damages pipes/fixtures? How’s that plan looking then?
Yup.
And the Brits have problems with pipes in general because they don’t bury them that deep, but their winters are harsher lately and the frost line is going down farther than before, damaging pipes and freezing the uninsulated on-demand water heater pipes and units.
You really think a teacher knows that? Or the fact that maintaining a constant temp will use far less CO2 then going from 34 to 68.