pls help with grow temps

get one of those inline centrifugal fans, the 440cfm type and also get a variable speed for it. vintech doesnt make too much noise. You can also build a very effective silencer for the exhaust, but ideally just put a nice hole in your ceiling and vent the hot air out of the room while fresh cool air gets sucked into the tent from the room and house its self. make about a 6" hole for the stuff and id really recommend a silencer if your venting into the attic just to keep things more stealth. make a clean cut hole, for a snug fit, you want to be able to save that piece of sheet rock to patch up the hole later on if you need to so be sure to cut the sheet rock at an angle just like you do to the top of a pumpkin so that the top doesn't fall in. this will make a quick repair easy.

inline 6" fan with a filter and a duct silencer will work great. I used to exhaust into the rafters between floors and pull in cool air with natural flow called negative pressure. when the tent sucks in slightly you have the pressure correct. cool and no smell. Air is like rope you lull it not push it for ease. peace

I have an inline fan running in my closet grow but instead of venting into the attic (my damn ac unit literally sits right ontop of this closet in the attic) i ended up re routing it back into the room the closets in and that also keeps that 900w led temp under control. I attatched a few pics.