The heat of my two S3's is a pain in the living room of my 2bdrm 900 Sq ft Apt and I've got nice air being a mile from the Pacific Ocean. I don't mind when I'm not home (my miners rarely go above 42 C).

When I get home I make sure to face a fan outside a window. It's one of those Vornado fans you can get at Target. The thing is tiny but it's a beast. Just point your S3 exhaust towards it and it'll spit hot air straight out the dorm room. This should lower your room's ambient temperature a lot.