DarkRoom tent, CoolTube and 464 c.f.m. disaster

NinjaToke

NinjaToke

Active Member
Temps hella hi, 82degrees with 3x3x6 tent, 600hps lumatek digi w/super lumens, 464cfm Can-Fan. All this plus sum nutes and other random stuff cost 600+/-, the "cooltube" and tent were the first bought, can-fan was added after consulting store owners. After several configurations with the fan inside and outside tent temps were steady 82-84 and the room its in is air conditioned with window ac. even with ac blowing 60 degree air the tent stays HOTTT! Cooltube my nutsack, my hood and fan with far less blowing power keeps my light cool, granted its a 400 not 6 but still. Anyone know something im missing?
 
lovemug

lovemug

Well-Known Member
see if you can exchange the cooltube for something else ive got a euro 6 and its a beast about keeping a 600w MH conversion bulb cool.
 
C

Creek

Active Member
Are you pulling air into the tent as well? cool tubes only help so much your light will still put off infared that will heat up your tent. A aircooled shade is not gonna cool your tent it will make it cooler
 
NinjaToke

NinjaToke

Active Member
Creek said:
Are you pulling air into the tent as well? cool tubes only help so much your light will still put off infared that will heat up your tent. A aircooled shade is not gonna cool your tent it will make it cooler
Click to expand...
yes i have 188cfm fan pullin air in at bottom of tent next to ac
 
Mr.GreenJeans

Mr.GreenJeans

Well-Known Member
I like the Euro 6 hood, personally. I run 2 with 600 watt HPS (although one I will sometimes switch over th MH) and have never had a heat issue, but I'm using a bigger fan too. I run a 590 cfm 8" inline fan blowing into the attic. It's fed from a 8x6x6 T-fitting that has a 6" line going to each 3.5'x6.5'x9' flowering room, where it attaches to a Euro hood. I also cut two 4" holes in the floor of each room and screened them. That way I have a steady flow of cool air from under the house being drawn in (and I can always partially/completely cover one or both of the vents to help regulate temps if necessary). So far my rooms have held a steady 55 to 70 degrees no matter what I throw at them, and the hoods stay cool to the touch. I run the fan at about half speed because it's noisy as hell if you turn it up, plus it pulls TOO hard on full blast. At half speed she's whisper quiet and still maintains the temp range I want. I'm a firm believer in getting more fan than you'll actually need, and then tuning it down so it's pulling just enough air to maintain the desired temperatures.
 
Q

quietgardener

Active Member
600 W of light in a ventilated hood requires about 200 CFM of air movement through the hood to keep the grow tent about 5 degrees above the make-up air temperature. My suspicion is that either you are moving a lot less air than you think (possibly caused by a sharp bend right before or right after the fan) or you aren't effectively capturing the 60 degree air from your AC unit.

I'm running a 3.5 x 3.5 x 6 tent with one 400w HPS cool tube and one unducted 250W mh. Running my exhaust fan at about 100 CFM keeps my grow tent at about 10 degrees above room temperature (the room is 62 deg F)
 
NinjaToke

NinjaToke

Active Member
Mr.GreenJeans said:
I like the Euro 6 hood, personally. I run 2 with 600 watt HPS (although one I will sometimes switch over th MH) and have never had a heat issue, but I'm using a bigger fan too. I run a 590 cfm 8" inline fan blowing into the attic. It's fed from a 8x6x6 T-fitting that has a 6" line going to each 3.5'x6.5'x9' flowering room, where it attaches to a Euro hood. I also cut two 4" holes in the floor of each room and screened them. That way I have a steady flow of cool air from under the house being drawn in (and I can always partially/completely cover one or both of the vents to help regulate temps if necessary). So far my rooms have held a steady 55 to 70 degrees no matter what I throw at them, and the hoods stay cool to the touch. I run the fan at about half speed because it's noisy as hell if you turn it up, plus it pulls TOO hard on full blast. At half speed she's whisper quiet and still maintains the temp range I want. I'm a firm believer in getting more fan than you'll actually need, and then tuning it down so it's pulling just enough air to maintain the desired temperatures.
Click to expand...

quietgardener said:
600 W of light in a ventilated hood requires about 200 CFM of air movement through the hood to keep the grow tent about 5 degrees above the make-up air temperature. My suspicion is that either you are moving a lot less air than you think (possibly caused by a sharp bend right before or right after the fan) or you aren't effectively capturing the 60 degree air from your AC unit.

I'm running a 3.5 x 3.5 x 6 tent with one 400w HPS cool tube and one unducted 250W mh. Running my exhaust fan at about 100 CFM keeps my grow tent at about 10 degrees above room temperature (the room is 62 deg F)
Click to expand...


Quiet may be right, the size of fan/ducting/tent make it hard to provide smooth flowing curves. Suggestions?? The tent has one opening in the ceiling, 4 at the tops of the walls and two at the bottom of each wall. the fan is damn big and as stated above the fan was chosen based on overkill to start and cut back as needed. i cant imagine an 8" if this one is jet-like
 
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