

Does that work for ground source heat pumps too? Like could I literally cool my floor with one? For summer and light winter, my air to air unit is fine and air to water is great too, but when it’s like -25 or -30 out, the air source units start getting pretty inefficient.
I installed triple glazing and started shutting windows during the day, but since there’s little ventilation, that means the air gets really bad here eventually. There’s trees on the south side of the house and no windows on that wall. I’m further north than the majority of the UK (think between Inverness and Shetland for my latitude - except I’m at the Baltic sea).
The AC is just necessary in the last few years. A decade ago it got hot, but not unbearably. Now it’s worse. I think the increased insulation is actually making AC-less, windows-closed situation heat worse since there are no shutters. I do wonder if polarizing film would be an effective alternative, as I don’t want it to be dark 24/7 and I’d forget to re-open the shutters when the summer is over lol