400w mh Grow Closet help

First off, Hello. Thanks for even taking your time to look at my thread.

Now, I have a 3x2x6 closet that i just painted basic white with primer i had sitting around, and im getting a couple of 'big computer fans' (about 3 times the size of the average) for my intake and outtake but i have a very good feeling that this space is going to get too hot even with the airflow, am i correct?

I have 2 400w mh lights that i can use but im afraid of putting both of them in there..

What can i do?

that space if probably tight for even one... maybe try a cooltube setup but thats gona need a proper in-line fan ect

computer fans wont do enough i had 2 small squirell cage fans exhausting and still was in the 90 deg range till i added a air conditioned duct which brought it down to 75
and that was with 2 - 400 watt hps in a 3 x 8 x 5 high room. so u need bigger fan or a ac duct to add cool air

Alright well the fans im getting are bigger than the average pc fan, and ill even maybe put a small fan in pointing at the light(s) would that work do you think?

I have about the same size closet. I use one 400W HID (MH for Veg/HPS for flowering). One 400W is more than enough to cover what you can grow in this space. I just keep the door open during lights on and an 8 inch fan blowing on them. My temps run from 75 - 83. The MH gets a little warmer than the HPS. Make sure you put the ballast outside the closet. They generate a lot of heat (even the digital ones). I just close the closet door during lights off.

Don't leave your door open during flower!!! Your house will be STANKY!!!!

You could always run an exhaust for the light as well as another from the top of the room...then just use passive intake. Seal the closet with panda paper and a tarp-zip up.


Check out the link in my signature, I also grow in a closet with one 400W. Have any questions about anything feel free to ask.

jakexxx said:

Don't leave your door open during flower!!! Your house will be STANKY!!!!

Click to expand...

Yep, that's becoming an issue. Gonna have to get off my ass and make a vent up through to the attic. I like the smell, but I just don't think some folks would understand, lol.