Hi..

The room faces west so gets a lot of sun from midday
onwards. Temps don't drop significantly now we have Air
Con in there, which I'm also hoping will help in the
summer to keep it cooler - not just for the fish. The
walls are cavity wall insulated and the glass is K Glass.
There are lots of opening windows and we have window
blinds that somehow are supposed to keep in the heat in
the winter and cool the room in the summer (can't exactly
remember the marketing blurb).

Sounds good! Didn't want to scare you, was job-related
involved with them..

There is another conservatory in south-west direction and we
use it the complete year. The small cool one in north
direction is my summer refuge.

The tank has a sliding glass lid - I have already noticed
the water condensing on the lid - hmmm, another thing to
think about - it doesn't look too pretty..

Probably no problem with Air Con. Enjoy it.
--
cu
Marco