Was great saw son and father couldn't ask for more than that.
At my old place I ran couple 1k air cooled hoods with a independent fan just for the hoods. Also one 8" fan with a carbon filter scrubbing air in the room. My filter was having air pulled thru like smokey said. I've never pushed air flow thru one personally. My fan for the hoods was pulling air from my lung room, pushing air thru the hoods. No carbon filter for the lights just filtered air. My air box had a furnace filter. Worked wellYea i think its more work on the fan if i remember right. Need a few clamps n what not to finish. Got all the balasts n hoods hung room disenfected what not figure ill get an early start on it tomorrow. Still gotta figure out how to cool those 2 new hoods. Might try the same fan as the other 2. Im lowering wattage down to 600 from 1k but adding 2 more 600s heh . If it doesnt raise my temps up ima just run all 4 from the same fan. Hydro shop mentioned to run a dedicated fan inside scrubbing and a seperate fan for the lights. Im tired ill figure it out later lol.