So ffirst off i have a fan like this https://www.amazon.com/gp/aw/d/B010...inline+fan&dpPl=1&dpID=51z7XEAIbkL&ref=plSrch Ive seen alot of things saying these fans arent good to use, now the one i have is the cheaper one with plastic fan blades.. its only 140 cfm,, now my room is 3.5'x8x7 i believe i woukd need a 240cfm fan to exhaust properly an for the passive intake to work correctly (plz correct me if im wrong on that) so my question is would a better one of these types suffice like a 400 cfm one or should i break down an buy a better one?
A centrifugal fan is what you want. The problem with other types, they will continue to draw power, over heat, and burn themselves out to keep Rpms and air flow up. A centrifugal will only draw as much Amps as it's using. So when attached to a carbon filter for example, where air flow is reduced, the centrifugal style will adjust while other types will continue to run at max and burn out. Good luck bud
Ok i gotcha.. it seems to be doing a halfway decent job but will be switching over to somethin better soon heres a pic of the ladys have to put some of the smaller ones in my 3x3x6 tent here soon as i finish settin It up gonna flower some soon one of them was suffering from heat stress pretty bad i dunno y its the same strain but been watering with neptunes harvest an raised the light a bit an seems to be fine.. i cut off all the nasty twisted burnt stuff an all new nice green growrh os comin back so i guess thats what was wrong. How they look blades