Pete C wrote:

If your window cannot be opened it might be fairly cheap to get it
replaced with one that does, especially if it's a sealed DG unit. Or
it's possible to get window tint film that reflects a high proportion
of the heat.

It can be opened, but opening it on a hot day doesn't help much :-(


Might get heat pump AC eventually to use for heating as well as
cooling on extra hot days though.

That's what I have in this room. I installed in in November, and it's
proving to be very useful.

--
Grunff