I have a 1/4 power chiller on my 40 breeder. I have it set to 79 degrees. I also have it in my cabinet. I don't have a door on the cabinet and the chiller is in front. The chiller puts off a lot of heat. Enough to heat up the room. Dose anyone have a chiller and dose it heat up your room also. I don't think that I can run it in the summer time. When I don't have the chiller going my water gets up to 90 degrees. Any advise would be great. Oh a little bit about my tank. I have a canopy with very little ventilation that I have to fix and I need LED lights. Right now I have a 250 watt MH. Thanks for the help.