I've got a cabinet I built that measures 36"x36"x72". I am using just 2 Lasko Box fans. Temps at the top of the canopy, which is 8 inches away, under a 400 watt HPS is at a steady 77 degrees.

I JUST NOW built a tray style carbon scrubber to go over the exhaust box fan. Air flow has come to a crawl but I'm willing to bet it still pushes about 300CFM.

Lasko rates this fan at slightly higher than 3200 CFM at it's highest setting.

The problem is that they velocity at which the air moves is not very fast.

I'm about to go check on my temps in my cabinet in about an hour or so. I'll let you know what the temps are with the carbon scrubber on.

btw.. box fans cost me 10 bucks a piece at Target.
daihashi Reviewed by daihashi on . Cooling in small spaces A wooden box with dimensions 36"x20"x60" (25 cubic feet) sits inside a closed space measuring 37"x61"x93" (121 cubic feet). The closed space is used for storage and so actually has less room than that available. Is it possible to use a 400 watt HPS light with hood inside the wooden box and still maintain optimal temperatures? Preliminary tests suggest that temperatures easily exceed 100°F within the box, using 2-3 80mm fans each on intakes and outtakes. The light itself generates most of Rating: 5