if a fan that is to big (to much cfm) for the filter pulls it air to fast for the filter to scrub the odor from the air, what about a fan that has less cfm than the filters recommended min cfm...example can 33 filter recomeds a fan with a cfm of min 100 and a max 0f 200 cfm if the fan is rated at 150 cfm but it is ran at half speed ( 75 cfm due to noise issues ) how does that effect the performance of the filter ?
I think i can answer this question for you, as i personally do exactly what you're saying. I run a Can33 filter, and 2 inline fans that i know aren't hitting the minimum 100cfm. You know why they have a max, air won't be scrubbed enough,.. well if air is coming out of your duct, then a negative vacuum, or "pressure" as 840/2 called it,
IS being created, and furthermore, that's all you need to keep smell in only the grow room. The longer the air particles have to pass across the activated carbon in the filter, the cleaner that air will be when it comes out, and the longer your filter will last. Win win indeed