I need to cool a 6x4 grow room. I have found a few squirril cage fans on e-bay, looking at a 265cfm for exhaust & a 180cfm air supply fan. Will these be enough? No way to get air conditioning to the closet. The summer heat & 800w of light heat definately hurt my yield in that closet last year. Temps ran about 90 degrees, need to drop that!!!