PLEASE HELP grow room to hot.!!!

I have a 2' 2" X 2' X 40" cabinet and 1 6 inch cpu fan by the light to pull the hot air out. 1 8" inline fan just to move air and for lighting I have 4 26 watt CFL and a 2 tube 2' flourescent 1 cold white 1 warm white and the temp is getting to 90-95 degrees I need to drop it 15-20 degrees please help is there something I can buy at walmart to cool the air off. oh yea I dont have a intake fan but the doors on the cabinet are sliding doors so I put panda plastic up to light proof the cabinet and leave the door cracked a little with a hidden lock so it cant open all the way. But if there is a way to cool it off without drilling anymore holes. It is getting enough fresh air, it just needs cool air. PLEASE REPLY ANYBODY!!!!!!!!

is this a stealth grow?

ReAVeR said:

is this a stealth grow?

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Yes this is very stealth grow trying to keep complete light proof.

15-20 degrees is gonna be tough but a swamp cooler should bring it down about 5-10 degrees or so. Here is a youtube video as an example

http://www.youtube.com/watch?v=zR9CA8lJGvs&feature=related

Basically the idea is to use ice water and pump it through a copper tube wrapped around a fan. Yes, a slight step above putting a dish of ice cubes in front of the fan but it works. Just make sure you add as much ice as you can as often as you can. Probably cost you $30 for the full setup but 85 degrees is a lot better than 90 and it may work better but its certainly worth a try. The other alternative is to buy a portable ac unit and pump the air into your setup but those run anywhere from $100-$300+ and will use more power than the swamp cooler setup and are certainly not as stealthy.

Let us know how it goes!

i have the same issue right now

get a bigger fan, cpu fans are for cpus imo, the inline duct fans work awesome, i have one 6inch 250cfm fan i got for 30 bucks and it cools my 4x4x4 foot room to 80 very nicely. that or leave your cabnite door open a bit till you figure somthing out.


btw if its lightproof its probly not letting air in or out..

good luck and happy growing!

totally agree, gotta cool it down.
Light proofing the grow spot sounds like a great idea but the time i tried that with my closet.... lol.... the next mourning it was hot as balls in there.
You deffinately have to let the air circulate.
Meaning old air moves out, new air blows in.
That way you don't have hot air trapped in a small space while lights are making it even hotter.
Now I have a fan in the top corner of the closet blowing at a 45 degree at the wall and another pretty hefty fan in the other side of the closet aimed for blowing the hot air pushed from the other fan out the door, which I leave open durring light on periods.

Good luck! hope i helped, pretty nubey myself with this stuff. In flowering with my first grow now...

their is no way to achieve you goals with out having a hole to let air out and a hole to let new air in. you will also need at least 1 good fan at one of those holes. i bought 2 50cfm bathroom exhaust fans for 12 buck a piece ( 75cfm for $22 also available) . i used them to cool a closet grow that was 2 x 7x 8 with 4 100 watt mh security lights. i put them on the ceiling cut 2 4 in hole and ran 4in ducting out the holes, the new air came in from around the closet doors poor seal. if i turned them off the room temp would go up at least 20 degrees f . and that only would take 5 min to do, i would not leave them off any longer than that so who knows how hot it would have gotten in there.

Thanks but I do have one hole cut the 12v 6" cpu fan is at the top pulling the hot air that rises out it just isnt pulling hard enough. Also about the copper tubing with cold water that is out of the question thanks for posting though I appreciate anyones input.

I don't know where you live man, but where I'm at it's real cold outside this time of year. It sounds like this box is pretty portable, no? I'd say if you only have one hole cut or exhaust, cut another big one, at least twice the diameter of the exhaust fan, as far from the exhaust as you can in the box. Then open a window, and put the side of the box with the intake hole as close to the window as you can.
You may still have to get a fan with a higher CFM rating, but if you have those two holes set up with that size ratio, and you seal off all other airflow in and out of the box, you should get cool air flowing through there very well. Hope this helps!


P.S. if you live in the tropics or something then I don't know what to tell you. Grow outside? I would imagine most places have external temps in the 50's right now at most, my area it's in the 20's at night already! Winter's a comin!

Thanks saycheese I wasnt going to make a swamp cooler, but I didnt even know I had all the stuff to do it with so I made 1 and it has been two hours with the light on and the temp hasnt passed 81 degrees thanks. Before I made it the temps with the lights on for two hours were in the 90s.

PS. It only took 10 min to make.

try to put a piece of glass between your lights and plants. cut it 1/8 in short and narrower than the cabinet, cut a 1/8 grove or notch around the inside diameter of the cabinet just below the lights. then you can slide the glass in like shelf sealing the lights heat away from plants.

stealth sucks as far as ventilation goes. i started off stealth and opened it up lol cuz it gets hots as hell in there... think about it.

neph19d said:

stealth sucks as far as ventilation goes. i started off stealth and opened it up lol cuz it gets hots as hell in there... think about it.

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Good point. I built a custom stealth cabinet and discovered right away heat would be the main issue. I got innovative though. I realized even during summer, Oregon will supply very cool air at night outdoors. So I run PVC under the futon next to the cabinet and up to a window at the end of the room (about 6 feet away). I use 12v PC fans at either end to increase intake. This system provides enough cool air to keep my flower layer (3.5'w x 2.5'd x 3.5'h) and veg layer (3.5'w x 2.5'd x 2.5'h) at 82 - 88 degrees all the time, even with a 250w HPS in the upper layer and about 100w worth of various floros in the veg layer.

The only catch is that you must live in the right type of climate and have your grow area somewhere near a window (10 ft or so) to do this.

I will be happy to provide pics and instruction upon request.