HEAT PROBLEMS in a 400w grow

[BuffBuffPass]

• Just started my new closet grow tent setup a few days ago:
  
  Current strains:
  -Afgooey (Afghani #1 x Maui Haze)
  -Blueberry (Purple Thai x Afghan)
  -BC Kush (Afghan x Grapefruit) - not pictured (yet)
  -Blue Dream (Blueberry x Haze)
  -Jedi Deathstar (Jedi Kush x Deathstar) - not much info on this strain so genetics may not be 100% correct.
  -Sweet Kush (Sweet Tooth x OG Kush)
  
  All these were obtained from clones from local caregivers. Pest, mold and disease free of course.
  They are all in 2 gal buckets with organic soil mix.
  
  All grown with organic soil mix and FoxFarm nutes.
  
  These were started under 2x 65watt CFLs for 1 week. Now they are under 400w MH.
  During the week they were under the CFLs the temp was about 76-78 depending on the outside weather a bit.
  But now that they are under the 400w MH (about two feet from plants) it is sitting around 80-82, even with two box fans (both taped into the tent for intake and exhaust) and an oscillating fan. The space is only about 4x7x10
  
  Anyone have an idea of how to lower the temp to at least below 80? I am getting another fan in a few days to blow over the top of the light for outtake. Just wishing it would snow because then the heat would go away for sure. But still have somewhat of a heat issue for now unfortunately.
  Thanks!!!​

  
  
  ​

 

[bigrake]

Fill a bucket/bowl with ice and put it in front of the oscillating fan cheap easy.

 

[MrGhettoGrower]

you need a pic and a fan blow between the plant
and light then you can put the light 14"-16" is
more idea for a 400 watter

 

[BuffBuffPass]

Hey thanks for the suggestions. you can see pics of the grow here https://www.rollitup.org/general-marijuana-growing/563971-dank-new-400w-organic-soil.html

I tried using some frozen water bottles by the intake fan. But the temp is still at 82. I was wondering if maybe my thermometer was in the wrong spot. It is at plant level in the middle of the light getting direct heat. Should it be in the shade?

 

[ryan1918]

Why don't you get a cheap $100 central air unit, one that you can program the temp in there to keep it cool, my plants are 1000x better from dropping the temps 20 degrees your yield will increase, buds will look better, and you will be much happier. I know that I won't have to worry about that much longer in michigan as I will be getting free central air from my window, Good luck!

 

[mr2shim]

Why don't you get a cheap $100 central air unit, one that you can program the temp in there to keep it cool, my plants are 1000x better from dropping the temps 20 degrees your yield will increase, buds will look better, and you will be much happier. I know that I won't have to worry about that much longer in michigan as I will be getting free central air from my window, Good luck!

Again? A $100 Central air unit? Where did you find one that cheap? Do you even know what central air is?! The ONLY kind of air conditioner you're going to find that cheap are WINDOW a/c's which is NOT the same thing as a central air unit. Come on man. Why do you keep trying to give advice if you have no idea what you're talking about? I have to go behind you and correct your errors. It's getting rather old.

 

[billybob420]

I wouldn't even sweat it at 82. Straight up, wouldn't even worry about it.

 

[mr2shim]

I wouldn't even sweat it at 82. Straight up, wouldn't even worry about it.

Exactly! My grow is anywhere from 79-84 with the lights on. I don't worry about it. 89+ is when you want to worry.

 

[BuffBuffPass]

I got a 12000 btu window ac unit. hopefully that will cool off the ambient room temp and bring in
cold air instead of blowing the hot air around. also I was wondering if I should worry about humidity? im in Colorado and its 20-28% humidity. do I need a humidifier?

 

[ryan1918]

Again? A $100 Central air unit? Where did you find one that cheap? Do you even know what central air is?! The ONLY kind of air conditioner you're going to find that cheap are WINDOW a/c's which is NOT the same thing as a central air unit. Come on man. Why do you keep trying to give advice if you have no idea what you're talking about? I have to go behind you and correct your errors. It's getting rather old.

I meant a/c unit not central air, sorry It was the weed.

 

[ryan1918]

I got a 12000 btu window ac unit. hopefully that will cool off the ambient room temp and bring in
cold air instead of blowing the hot air around. also I was wondering if I should worry about humidity? im in Colorado and its 20-28% humidity. do I need a humidifier?

It will a ton, I replaced my 5,000 with a 12,000 and I can get temps down to 70 with 3200 watt's going, I believe it should be around 40-50% I know mine is at 45-55% which I believe 51% is considered high, I know the a/c does change the room very much so.

 

[BuffBuffPass]

sweet. I will see how low i can drop the temperature before I add humidity to the room. but I will probably get a cheap humidifier and bring humidity up to ~40%

 

[Coho]

You blowing the hot air outside or heating the room?

 

[BuffBuffPass]

Blowing cold air from the ac unit into the tent. With the ac unit I have the temp down to 75.5-76.2f with lights on. But now im worried about humidity. Has anyone ever used a humidifier?