Temperature problems

Allright I put a fan in my grow cabinet to try and make the environment a bit better since I'm having problems with temperatures. It used to be 93 and now with the fan inside it feels cooler but the thermometer reads 98.6 What gives?

You need something to pull the air out of there. not just move it around.

Turn your fan around and exhaust the air and check temps again. You really need intake and exhaust fans to do it right.

This is pissing me off.. I just found out that my room temperature is 95 so it's useless trying to use a fan to bring down the cabinet's temperature. And electricity is too expensive to have an ac here. And ice doesn't seem to last long in this temperature.. any more suggestions?

I was thinking does anyone know of any micro airconditions that pull very little power? They just need to be able to put the temperature down by about 10 or 15 degrees fahrenheit.

You need a fan to pull the air out of the grow area. I know you don't think it will work, but you would be surprised. Try doing that first instead of trying to find some micro airconditioner thingy.

Exhaust is more important than intake in this situation. But with the temps of the room your grow is in being 95 its not gonna be easy keeping the grow area 15 dergrees cooler without ac. Id say buy a small window unit ac for $100 and vent it into your grow cabinet and use the fan u already have to pull the hot air back out. But till then, turn your fan around and exhaust that hot air out.

Hmm I'll try finding a large fan even though I'll probabbly end up with 12cm computer case fans. Last time I tried fans they really didn't affect the temperature but I think it's because there are just tiny holes for the air like this:


Do you think if I cut out a large hole the size of the fan it will work better?

And I'm waiting for my paycheck to try and build an ac myself (after a couple of bongs and a pipe maybe since I don't have any) A couple of peltiers, heatsinks and fans should do the trick. It'll probabbly be more than $100 but it'll be built to scale and for the purpose of cooling my growroom so it shouldn't be bad and will be quite neat.

Dude, your fans will work much better with one large hole instead of those small holes. Probably more quiet too. You can build an AC yourself? Hows that work?

It's not really an ac.. but close. You just sandwich a peltier between two heatsinks with a fan attached to each heatsink. Then put the cold side facing the grow and duct the other side to the exhaust.

Alternatively you can just mess around with a dehumidifier since it's really a backwards ac

Very interesting indeed, thats a new one for me. Id like to see some pics of a setup like that so if you build this thing take lots of photos and maybe you could post it in the DIY section, we have a DIY section somewhere right?

Yes of course we do And that's a good idea, hadn't thought about posting a diy about it.

i was contemplating a pelteir cooler myself.

was gonna run a tec through a closed reservoir (cylinder rubbermaid cooler) with the cold sink on the inside. add an input and output hole, fill it with ammonia, and pump it into the cab to a small oil cooler in front of the intake.

never did get around to it.

this is another interpretation here:

Air Cooler/Heater - Instructables - DIY, How To, home, tech

By now you should have an exhaust fan at the top and two intake fans at the bottom.

Similar to swamp coolers, a cage should be placed around the rear of each intake fan. Im sure you can find or construct one that has the shape of a cube but with one side open so that it can be placed behind the intake fans. The cages should be made up of wire so that it holds it shape yet allows maximum air flow. Now find a water holding material that can be wrapped around each cage. This causes the air to be cooled since your intake fans are pulling air from within a cold cage and not the 95 degree temperature air from your room.

Conoclast said:

Allright I put a fan in my grow cabinet to try and make the environment a bit better since I'm having problems with temperatures. It used to be 93 and now with the fan inside it feels cooler but the thermometer reads 98.6 What gives?

Click to expand...

try a cool air humidifier....10 buckson ebay......they work

both of the above posts work, but they raise humidity considerably. the TEC cooler can actually lower the humidity depending on the system you decide to work with. water in the air near the radiator will condense as it's cooled, so if u collect and remove it daily you will actually be lowering humidity in the grow room....

Get a cool tube.