Definitely maintaining negative pressure. Intense vacuum on my panda film.

My "closed loop" simply means that the vertitubes heat never enters my room directly. My room is partitioned off in just panda film. I pull outside room air into the top of my growroom, straight down through the vertitube and immediately back out of my grow area. Then its exhausted out into my house. I have no attic space to work with. This is the reasoning for this.

Thanks
SyDsHo Reviewed by SyDsHo on . Over-heating growroom Hello all. I'm having a hell of a time getting my daytime temp below 80. I thought it was fine for a week, then realized my probe wasnt working properly. Since getting my new probe, I had to add an eight in in line duct booster for my outside air intake. It was previously a passive intake. I was running so hot I added to see what kinda difference it would make. It shaved about 4-5 degrees. So currently, Its about 75 the first two hrs. Up to eighty for about five to six more hrs. Then crept up Rating: 5