Temp Issues ?

Hello ,



Just picked a ds 90 tent 3x4x5' ,running a 400 watt under honeywill fan with a 4'' inline fan and 4'' exhaust . Temps are 32 F, fan is on low setting ,as all the threads say to do.
Now trying to drop my temps over the past few days running my window ac at 72 -70 with ceiling fan going . But still staying at that temp ? I am a newb but have been reading on vert grows and felt confident and still do just need some insight .

Picked up a cool tube to help reduce temp and are the same made no differance ? Another thing is I not sure how to hang this verticlally besides having it on a milk crate with the fan blowing underneath .


whats the best approach from here ?

Are you running ducting from one side of the tube to outside the tent? That's how I used to do it and it worked for me in a small closet. Maybe some pics to help us better understand what's going on.

g00sEgg said:

Are you running ducting from one side of the tube to outside the tent? That's how I used to do it and it worked for me in a small closet. Maybe some pics to help us better understand what's going on.

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Venting ,


Yes the carbon filter and exhaust is outside the tent running though the top right corner exhausting through a cool tube all 4'' ducting vent is connected to cool tube also ? , The intake is on the left bottom corner with a ac vent feeding it cool air .
I will show picks tomorrow but this is my general desprition of the set up , confusued how the cooltube has made no temp drop as this was possibly the key to the solution . Most grows just go bare buld like how I started . Pics to follow .

It seems you have the same grow as me going ! Will look if you have pics to compare .It seems you are horizontal though

Your tent is sealed and everything? Yes, that is weird if how you've described it is how I have it pictured in my head. You may need a bigger/more cfm fan. What's the CFM rating for your fan. With a 400w you usually want at least a 400cfm fan.

Will have to cheek that , but the tent sucks in when closed so not sure if a bigger one is needed again correct me if wrong . Looks like it's sealed proper ducting tape and clamps and my buddy has the same set up but is horizontal with reflectors but is room is alot smaller to cool then mine . Good news is the clones in them are thriving but want to get why it's not to cooling down in temps !

Fan is 175 CFM so this could be my solution to upgrade to a 400 ,but is that possible with a 4'' fan ?

CDNSTEVE said:

Fan is 175 CFM so this could be my solution to upgrade to a 400 ,but is that possible with a 4'' fan ?

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I'm going to say you're going to need at least a 6"

Ok a update on my temps since upgrading to a 6'' inline fan rated at 440CFM I am at 27-30 degrees with 22 during lights off been some fine tuning but progressing .Hope to start a journel of my first vert grow !