He's doing a sealed room so the lights run in an external loop. i.e. no exhaust from the room. Just the lights pulling from an external source. Should greatly reduce the CFM requirements. Depending in intake temps I can't see needing a 600+ CFM fan.
bigsby Reviewed by bigsby on . 2 x 1000w HPS Ventilation Question In the process of setting up my new room and just had a quick question. Plan on running 2 air cooled 1000w HPS in a row with one fan. Both hoods will be Magnum XXXL with 8" flanges. Will a 8" Max Fan rated at 667 CFM be enough to cool both of the hoods? The ducting run will be minimal, under 10' total. Plan to use sheet metal ducting for everything. From what I've been reading it should be plenty, but just wanted to get a few more opinions from people running a similar setup before Rating: 5