those little in-line duct fans are not going to cut it for that size room by any means.search through here, Hydro Wholesale offers Wholesale Hydroponics, HPS and MH Grow Lights, HydroWholesale hydroponic Supp: cost effective fans are more towards the bottom. if you do decide to purchase something from this site i would suggest staying away from the in-line series TD fans, i have 3 of the 6 inch and there pretty much garbage