Im starting a new project with two 400w hps for flower in the above mentioned sized grow tent. My intent is to use the 5000 btu window AC unit I have laying around to cool it. I haven't received my tent yet but ive been brainstorming ways to utilize the AC unit in the tent, I know the frame is not sturdy enough to support the AC unit. I thought about using ducts to channel the air into the tent when the lights are on, but I think theres no way to control temp that way because the thermometer on the unit would be operating based on ambient room temperature and not the actual tent temperature. I already have a fan to move air around and an exhaust fan. My problem is getting the cold air from the AC unit into the tent efficiently Input, ideas, and solutions please.
Cooling 96"x48"x78" grow tent, 2 x 400watt hps
- Thread starter kushkilla
- Start date
DemonTrich
Well-Known Member
I have an 8000btu portable a/c unit that ducting ran so my intake fan sucks in the cold air. I have to play with the ducting so my intake fan doesn't suck in too much air and cause a positive pressure. I want negative pressure. and I have my a/c set on 64*, and runs 12hrs continuously. 75* lights on and 73* lights off. 
I like that portable A/C unit. Looks like a good investment I will price some units this week. Yes negative pressure for sure, thanks for the reply I really want my temps low 70's mid 60's if possible. Im on a search for the best purple phenos I can find and really want to lower the temps as much as possible to get the coloring from the plantsI have an 8000btu portable a/c unit that ducting ran so my intake fan sucks in the cold air. I have to play with the ducting so my intake fan doesn't suck in too much air and cause a positive pressure. I want negative pressure. and I have my a/c set on 64*, and runs 12hrs continuously. 75* lights on and 73* lights off.
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DemonTrich
Well-Known Member
KK
make sure you buy the extended warranty on the portable ac. I bought a 5yr extended, plus the mfg 1 yr, I get 6 yrs of free replacement.
make sure you buy the extended warranty on the portable ac. I bought a 5yr extended, plus the mfg 1 yr, I get 6 yrs of free replacement.
941mick
Well-Known Member
A 600cfm exhaust fan or higher can keep these tents pretty cool, even without A/C, especially if your only running 2 400's. Even when my HVAC went down a few weeks ago my temps never went above 83/84 degrees, and that's running 1800w in cool tubes....With A/C ducted to the tent I can keep it in the low to mid 70's with the lights on.