paint the inside of your passive intake holes flat black and add 1 more 90 or 45 to it, and prob want atleast 2 more passive intakes

you are goin to need more than an inductor/booster fan, should get a good quality inline fan or a squirl cage fan. and to hook it up i would cut a hole in side of cab(no room to get flex tubing in there) and run the fan outside the box and on the other side of the cooltube i would leave open. put a carbon filter on fan and you should be set
texas grass Reviewed by texas grass on . 400W MH/HPS Ventilation ?s Hi All, been lurking for around a month, absorbing and spending far too many billable hours on this forum. Thanks to everyone for this wealth of knowledge, i have so many subscribed threads its insane. So i built my cab (growing area) 28.5"W 20"D 52.5"H (a home depot special) and i'm running some proactive tuning tests and lightproofing. I'm running a 400W MH conv. bulb w/ a cooltube which is far too hot. high 80s - low 90's on 24/0 after a day or two. my question is this: i Rating: 5