I pretty much have the same setup you have except no magnums, and I have a a/c unit in the room,during summer a/c is a must,but its so cold at night right now i can get away w/ it off most of the time...but I also have a small room(5ft wide 9ft long 6 1/2 ft high needs 275cfm w/o anything added to equation)...you have to calculate how much CFM your room needs...if your room only needs say 250-500 cfm then you should be good IMO...