Help heat issues

I have a old dresser I converted into a grow cab. It is 2ft wide by 20 in deep 4 foot tall.
I have 3/4 in open slots at the front and back at the bottom that run full length for fresh air to be drawn in. Also have a 4 in 100 cfm inline fan mounted in the top. I bought a 400 watt mh/hps light with adjustable out put. When I have it at 50% im running about 85 degrees 100% is close to 100 degrees. What can I do to cool it down?

Bigger intakes, stronger fan, maybe a cooltube.. Are You sure U need all those 400? 250 maybe enough for the room..

400 seems like its gonna be an oven without a cooltube. My cab is about the samesize and my 150w HPS makes it cook in there.

Probably just gonna run it at 50 percent. I bought the 400 because I have a ,4x4 tent set up with a 8 bulb t5 ho fixture and figured if the cab didn't work out I could use it in my tent. So far the t5s are kicking butt.
I'll probably install three computer fans along the bottom with more intake holes and see what that does.
The room I'm set up in average temp is 62 It would be cool enough to keep it cool in the cab.

newbiegro said:

I have a old dresser I converted into a grow cab. It is 2ft wide by 20 in deep 4 foot tall.
I have 3/4 in open slots at the front and back at the bottom that run full length for fresh air to be drawn in. Also have a 4 in 100 cfm inline fan mounted in the top. I bought a 400 watt mh/hps light with adjustable out put. When I have it at 50% im running about 85 degrees 100% is close to 100 degrees. What can I do to cool it down?

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Thank god you have a bigger area to install that, there is just not enough sq ft of space to cool 400w, no matter what you do, But on the other hand you can def bake some nice cookies or brownies in there.

I like brownies lol. How big a box would I need to build to use this light?

newbiegro said:

I like brownies lol. How big a box would I need to build to use this light?

Click to expand...

How big isn't really a matter in the issue.. For your situation (limited space), you need to get the heat of the lamp under control.. +1 on the cool tube and +1 on the bigger fan.. 100 cfm isn't much and doesn't really rip the heat out of your box.. They do have bigger inline fans (I've seen up to 350 cfm boosters..) and that's at least what you'll need to suck the heat out of your box.

For a 400w you definitely need a cool tube.. AND a fan with more cfm.

Well I added two computer fans to the lower back of the cab pulling air into the cab. Temps are now at 70 running 50 % power and 82 running at 100% power.