Oh wow, Joan! Looking great, so many.
Nessa, my room is the garage, and all my tanks are in it (well, until the fish room is finished, that is).
I've found with the axolotls/unheated tanks, it doesn't keep anything cool. Basically whatever the temp is outside, that is what it's like inside. During summer, all tanks can get above 30*C.. so I have to work to cool things down. In Winter they can get about 10*C on average, if unheated/without chiller. Also gets very humid, so that doesn't help keep the tanks down. I have a humidity gauge thing, it can easily get 80% humidity in my room... it's horrible!