Heat issues in closet grow with Vortex fan

Kaelyb

Kaelyb

Member
Hey everyone,

First I gotta say thank you to all my fellow growers and tokers on this site for sharing such an abundance of knowledge,information, and advice about cultivation and everything green on the web. :clap:

This is my first grow and i'm having issues keeping the heat below 84 and 88 degrees in my closet grow room. I have 2 plants vegging under a 400 watt (HID) cool tube on a 18/6 schedule. The room measures 6x4x8 and it has a 4" vortex fan mounted at the top of the room that's exhausting into the attic. I just installed this fan a week ago and the temps have dropped 12-13 degrees (with door closed and lights on) and the plants look great. I also have a box fan running 24/7. I have one 4" passive intake into an air conditioned room as well. I do not have the Vortex attached to the cool tube due to the amount of ducting I would have to add as well as a 4" to 6" increaser. It's usually at least 100 degrees outside right now but I keep the house temperature at about 70. I'm also about to add a carbon filter with 210 cfm. Any advice on how to lower my temps without purchasing another inline fan would be great since the company I purchased from wants me to pay a 30% restocking fee :wall: and money is really tight right now.

My calculations:
Room volume: 8x6x4=192 cubic feet
4" vortex=172cfm
Min. CFM for exchanging air: 192 cubic feet/3minutes= 64cfm
Min. CFM to ventilate room: CFM= (64CFM) + (64CFM x 5%) + (64CFM x20%) =80CFM
(the above percentages included 20% for the carbon filter and 5% for the air cooled light.)
The fan has over twice the amount of the minimum CFMs required.






 
fir3dragon

fir3dragon

Well-Known Member
well, its the cooltube.. you need to get ducting to vent it. i would highly suggest upgrading to a 6 or even 8 inch fan..
 
W

worminator

New Member
this is what i did. i had a nft system (a small one) so naturally i had a res and i kept my nutes airated with a bubbler stone.heat was an issue both with my solution and with the ambient air so what i did was drill two holes in my nutrient res and piped 2ea 1/2 pvs lines outside,(my closet was on an exterior wall). outside i dug a 5 foot hole with a shovel and post hole diggers and inthe bottom of the hole i placed a roll of 1/2 copper,attached to the two peices of pvc.in one of the tubes i drilled a small hole and inserted an air line, the bubbles actually pump the chilled solution back to the res because the air will rise in the solution filled tubes, carrying the chilled nute solution with it. now once the chilled nutes returned back to the closet,i installed a small radiator cooler coil and the cold solution went through it before returning to the res.i directed my small fan at the coil and air passes through it, cooling the room air. what happens is this, warm solution is taken from the res,gravity fed to 5 feet below ground level,(in florida that is 68 degrees) then that is pulled with air bubbles back to the res,first passing through the cooling coil.what you end up with is a year round 68degree room and solution. hope this helps someone.
 
fir3dragon

fir3dragon

Well-Known Member
worminator said:
this is what i did. i had a nft system (a small one) so naturally i had a res and i kept my nutes airated with a bubbler stone.heat was an issue both with my solution and with the ambient air so what i did was drill two holes in my nutrient res and piped 2ea 1/2 pvs lines outside,(my closet was on an exterior wall). outside i dug a 5 foot hole with a shovel and post hole diggers and inthe bottom of the hole i placed a roll of 1/2 copper,attached to the two peices of pvc.in one of the tubes i drilled a small hole and inserted an air line, the bubbles actually pump the chilled solution back to the res because the air will rise in the solution filled tubes, carrying the chilled nute solution with it. now once the chilled nutes returned back to the closet,i installed a small radiator cooler coil and the cold solution went through it before returning to the res.i directed my small fan at the coil and air passes through it, cooling the room air. what happens is this, warm solution is taken from the res,gravity fed to 5 feet below ground level,(in florida that is 68 degrees) then that is pulled with air bubbles back to the res,first passing through the cooling coil.what you end up with is a year round 68degree room and solution. hope this helps someone.
Click to expand...
better get a backhoe with this idea. lol.
 
M

MircalGrow

Member
fir3dragon said:
well, its the cooltube.. you need to get ducting to vent it. i would highly suggest upgrading to a 6 or even 8 inch fan..
Click to expand...
I run a 6in with around the same CFM in a closet about the sam size, and my room tep stays 7 degrees warmer than what my Ac is set at. With outside temps in the 90-95 range, 82 is tops I get to on the hottest days. You need to hook that ducting up to the cool tube and make sure your pulling air from the top of the room. You are letting heat escape from the cool tube by not having it sealed up.
 
qwizoking

qwizoking

Well-Known Member
I have a 600watt cool tube with a 6 in clip on fan attached. My temps stay 75-79 in my little cab...I got a 20" box fan that works wonders, under 20 bucks over 2,000cfm. Fixed any ventilation issues I had.
 
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