Heat STress problems/solutions

[gotot]

im growing in a closet about 12 square feet. i have a 400w mh light and the temp will not go below 89-92 range, humidity 50% give or take. i have one box fan blowing air in, another on top of the closet shelf blowing air downward and another on top of the shelf blowing air out the closet. Help?

 

[helmoid]

im growing in a closet about 12 square feet. i have a 400w mh light and the temp will not go below 89-92 range, humidity 50% give or take. i have one box fan blowing air in, another on top of the closet shelf blowing air downward and another on top of the shelf blowing air out the closet. Help?

Well, if you cant get the temp down at all, you can supplement CO2 which will help the plants tolerate a higher temp. It really depends on your budget though.

Or get some stronger fans with a higher CFM rating.

 

[gotot]

Well, if you cant get the temp down at all, you can supplement CO2 which will help the plants tolerate a higher temp. It really depends on your budget though.

Or get some stronger fans with a higher CFM rating.

word i got a co2 tank and i put it on .2 even though that's really high for my space(.2 is meant for 800 squared centimeters, i have 48(roughly 15 squared feet))

 

[flowerbean]

dont have your fan blowing down!! its blowing warm air onto your plants.

 

[backwoodzbudz]

Try a different fan setup. Heat rises, so I would put the top two fans blowing out, with the box fan at the bottom blowing in. I'm just a noob though. But that's my opinion

 

[univativegrower]

Noob here as well, but having a higher cfm vent fan definitely seems to help control the temperature in my room. A good exhaust fan is much more effective than more intake fans. Active air makes fairly cheap in-line fans

 

[chronicis]

Noob here as well, but having a higher cfm vent fan definitely seems to help control the temperature in my room. A good exhaust fan is much more effective than more intake fans. Active air makes fairly cheap in-line fans

As univativegrower said, good exhaust is needed. I have 600w metal halide lamp and I use a single 240 CFM fan to cool it. my roon is 8 square feet, and temps stay at 79F when the light is on.