ventalation

I want to get a 47''x47''x79'' growlab,I also want to get a 600 watt aircooled light and carbonscrubber.I want to pull the air through the filter through the light to outside.Can anyone help me to find out what size filter and fan I need.

4'x4x6.5 = 104sq ft. fans need to replace air at least every 5 min, and any good inline fan on the market will clear that space in no time. 4in fans are usually around 140 or 150 cubic feet/min. But ive also heard from people to get a bigger fan like 6in thatll do 400cfm and use a fan controller on it and have it at half blast rather then a 4in on full blast all the time. carbon filters reduce the cfm by 20%. most carbon filters say how many cfm they can handle to pair accordingly. the air cooled light is a good call and will probably be necessary. dont forget about another fan at the bottom to bring fresh air in. the ideal room has a ratio of 1:5 for replenishing air so if you are sucking out 400cfm, then it has to be replenished with 80cfm of fresh air. if you can use a booster fan and that brings air in then great, if not you might have to get another quality inline fan but with less cfm so it keeps negative pressure in the tent (walls being sucked inward is negative pressure). the flaps on the bottom of the tent are ok for passive intake if you are in a room with a lot of fresh air and have some oscillating fans in there, but like mine thats in the attic with pretty stagnant air, bringing fresh air in from outside is the best. if you go onto those distribution websites like htgsupply or greners, they have carbon filter/fan kits.

thanks tango

yeah yeah! i was on the market for a fan and filter for my dr100 so i had all this info in my head that i felt like sharin. happy growing