I have an air cooled 600w hps hood that has a hookup for an exhaust fan. My room is 5x4x6. (120 cu. ft.) i figured that this would help to remove some of the heat directly from the light/hood. I still want another exhaust fan just to keep good ventilation in the room itself. i was originally looking to get around a 450cfm 6" fan for the room and a cheaper 200 cfm fan for the hood/light. since the hood's fan will be pulling some of the heat out already, do i need less cfm for the room's exhaust fan? thanks
eL.migz Reviewed by eL.migz on . Air cooled hood change necessary cfm? I have an air cooled 600w hps hood that has a hookup for an exhaust fan. My room is 5x4x6. (120 cu. ft.) i figured that this would help to remove some of the heat directly from the light/hood. I still want another exhaust fan just to keep good ventilation in the room itself. i was originally looking to get around a 450cfm 6" fan for the room and a cheaper 200 cfm fan for the hood/light. since the hood's fan will be pulling some of the heat out already, do i need less cfm for the room's exhaust Rating: 5