Quote Originally Posted by keeko
hey there onequickmove. im not the most knowledgeable person when it comes to ventilation but for cooling a 250watt i believe you will need atleast a 250cfm fan to exchange the air atleast twice a minute,which is recommeneded* (somebody correct me if im wrong)-.:twocents:
This doesn't make sense for a whole lot of reasons....

You need to cool your light AND you need to vent your grow space. You can push/pull the air thru a cooled fixture. If your grow space is the source of that air, you are venting it at the same time.

PC :smokin:
PharmaCan Reviewed by PharmaCan on . quiet fans and fan controllers two questions: for a cab grow, what would be the quietest fans? 120mm pc fans i would think? yes? and also, what would be the easiest/cheapest way to wire them? and i think i've seem variable-output power supplies so that you can crank the fan up or down; anyone using that? i'm going to be doing a large single cab with room for moms, veg, and flower, all cfl because of heat issues, but it's to go in my bedroom and i want to keep the noise down as much as possible, while also pulling enough Rating: 5