Yeah, as long as the temp isn't fluctuating too much, I don't think 82 is a concern. But as someone who once had to buy a second window unit just to keep my tank below 90 (that's right, got all the way up to 92 one day with out doing any visible damage), I would suggest fans, fans, and more fans. I had my set up in a corner at that time as well, and if you position a fan to move the air sitting behind the tank, it ought to knock off a few degrees. Also, if you don't mind replenishing the water loss, one of those little clip on fans blowing directly on the surface of your water (either in tank or sump) can drop it another couple of degrees. Keeping the temp constant is MUCH more important than what temp its actually at, though.