I have three different tents in my basement and as a result the air temp is rather high even outside the tents and I have a problem with it being too warm, about 80-85 degrees. I would ideally like to be around 72-76 but all the air in my basement is warm especially with how hot it has been this summer. BESIDES a window unit, is there any type of ac unit or cooling idea that I could use that would help maintain a lower temperature?