Yea it gets cold at night. But with 500 gallons, the temp stays pretty stable. My heater is set to come on at 76 and I run fans in the gargae during the day. The temp usuall varys between 78 in the morning and 81 during the hot afternoons.
My garage is not insulated and gets hot during the day due to lack of external ventilation. I have two exhaust fans that blow air in from a vent but the exhaust vent for the garage is on the other side from there and is down low behind my compressor so it does get a bit warm in there.
When it moves into the sunroom, it may be a different story as it will get direct sunlight amlost all day. The main windo wall of teh room faces south so I get full sun in the room. I do have 2 celing fans in the room and will be installing 2 bathroom exhaust fans inside the tank canopy/fish room to exhaust the heat outside. It will just be those Sana Ana hot days that I'll have to worry about the most.
I leave my water storage tanks outside and the temp gets a bit warm in them late in the day because they are heated by the sun and are closed up. But for the most part, they too stay a constant temp. I just haven't measured it yet.
