if i did the calculation rght the fan you got is about 91cfm at the high speed. that is about the same as the fan i 1st tried to use with my 400hps before i upgraded. as i said it works but not as good as a cooltube should with a more powerful fan on it. i got through a grow with it without problem before i upgraded. this is what i upgraded to it's only 15bucks more than the 1 you linked. Ecoplus 465 CFM Industrial Grade Blower - Plantlighting Hydroponics