On 27 Nov 2020 20:54:32 GMT, Tim+ wrote:

I seem to be in a minority here but the whole idea of maintaining a
constant bedroom temperature strikes me as odd. Get a thicker duvet or an
electric blanket that can be left on. Being warm under a duvet but having
cool air to breathe just feels right to me.

No, I think I'm in the minority judging by the absense of commercial
solutions!