EnderG60;982746 wrote: I have mine in my unconditioned basement as well. I have a 300g display with a 200g sump and 2x40g frag tanks.
Cooling is just fine as long as I keep fans on the sump and the dehumidifier going to keep evaporation up. I have a 70 pint a day unit.
Heating in the winter is a much larger PITA. I insulated the sump with 1" foam, and used two 1000w heaters and my tank would not go over 72 in the winter and routinely got down to 68 until I sucked it up and installed a gas water heater with a hot water loop in the sump.
If you can finish off the room and install a small heat pump it will solve many of those problems but ...$$$$$ Ive got maybe $1200 in fans, dehumidifier and gas heaters for the tank so take it for what its worth.
But on the bright side....I have a 200g sump! 200g fresh water tank, 200g salt mixing tank, 10g dosing tanks, an auto water changer, massive skimmer, big A pumps, dedicated sink, 150g QT system and all the room in the world to work. And my display is nearly silent!