Small dresser grow overheating

My box reaches 86 or 87 degrees after my lights are on for a few hours if I don't have the window piped directly to the box. My goal is for my box to not have to be hooked up to the window.

Here is a link to pictures of my box.

https://www.rollitup.org/stealth-micro-cab-growing/604036-stealth-dresser-grow-first-post.html


I have a 65cfm inline fan on the bottom of the cab hooked up to the carbon filter. The light is a 150w hps with remote ballast from htg supply. ther is also 2 23w t5's.

I'm wondering if maybe a 6inch blower fan with a speed controller would be enough or do you think my current fan would work with a diy cooltube?

Heat rises, but it looks like you are pulling the cooler air at the bottom into the filter and out the exhaust. Is there any way to draw more air from above the lamp, perhaps by raising the filter (add ducting). AFAIK, a cool tube would contain the heat more in the tube. This will still heat the cabinet unless it is drawn out of the tube and outside the box. My 4' tall cabinet (CFL) hits 86 right around the intake of the exhaust fan at the very top. A couple of inches under the bulbs - the tops of the plants - is 80 at most - that's just over 1 degree per inch from the top. I have passive air coming in at the very bottom - and again, since heat rises, this should be the cooler air in the room.

Neat set up..do eye see air cooling flanges on your hood?..The plants look very stressed..the single blade leaves are a symbol of a very harsh environment....how about a pain of glass between the light and the tops?..your area fan seems to be blowing heat off the lamp down onto the plants..i think your current blower would work if relocated...cool set up though..a few tweeks and you could probably sell them little jewels..good job..

-cheechako

I've thought about adding more ducting I was just worried that I might lose to much cfm with the extended pipe. Maybe a 2nd duct or 2 pc fans that only brings air in the box across the light and back out. So it wouldnt mix with any of the air inside the box. Would this make my box temps cooler? This would leave my current fan/filter setup for primarily odor reasons. Thanks for taking the time to help me out.

-westcannabis

I dont think they are cooling flanges. I just left the 2 ends of the reflector off so i could get better airflow around the bulb. Which plant looks stressed? all of them? The plant with SH on the pot has only had 1 leaf. Thats just how that strain grows I think. I saw some the plant the clone came off of and it was the same way. Thanks for your input. I will keep you updated.

However your can draw air from up top and around the light - so a second fan pulling from the light. But if you exhaust that, you bypass the carbon. That's why cool tubes are so cool - pardon the pun. You can draw fresh air in and out of just the light.

If I hard mount the light inside a glass tube and put an intake on the left side of the box and the exhaust on the right side. Then have a PC fan on both sides, one pushing one pulling. The air inside the cool tube would be kept entirely separate then the air inside the the box. I shouldn't need to pull that air through the carbon filter since it wouldn't have come in contact with my plants. The only downside i can see doing this is that I would have to put bricks or something under my plants, since my light would be non-adjustable.

But I think I will try your first idea before i build a cool tube. I'm gonna run to the store and get a piece of duct to get my carbon filter higher in the box. But ultimately I do want to build a cool tube because I think I will need it during the summer months.