Grow tent temps too high!

Taco740

Taco740

Active Member
Hey guys and gals of RIU, I got my first grow tent a couple of days ago. I set it up put my light and plants in and noticed my temps were at 100 degrees. I don't have a inline fan at the moment so I made a make shift exhaust and I was able to get the tent down to 82 degrees. Is there any way I can reduce the heat some more in my tent? I would greatly appreciate any and all help. The lives of my babies are at stake! Thanks in advance for the help.
 
GrnMonStr

GrnMonStr

Well-Known Member
A small diameter fan like 6" at Walmart in the top vent sucking hot air out and drawing cooler air in from a bottom opening may help out, a temporary solution maybe a small cooler with frozen 2 liter bottles and a pc fan sucking cool air from the cooler straight up if you have that stuff hanging around.
 
coreywebster

coreywebster

Well-Known Member
At 82 degrees F your plants are in no danger really. But there is no substitute for proper inline fans, proper air exchange and temp management.
You also want oscillating fans moving the air around. Intake vents open, thermometer out of direct light. Lights on at night and off in the hottest part of the day.
 
J

JDMase

Well-Known Member
My plants have hit 30c+ lately and have managed it well, water with lower PPM's and more often (I do one in the morning and one in the evening) seems to be doing me good so far.
 
Taco740

Taco740

Active Member
coreywebster said:
At 82 degrees F your plants are in no danger really. But there is no substitute for proper inline fans, proper air exchange and temp management.
You also want oscillating fans moving the air around. Intake vents open, thermometer out of direct light. Lights on at night and off in the hottest part of the day.
Click to expand...
I've had the lights on during the day. If i swith them to night wont that turn then hermy? Messing with the night schedule?
 
Taco740

Taco740

Active Member
GrnMonStr said:
A small diameter fan like 6" at Walmart in the top vent sucking hot air out and drawing cooler air in from a bottom opening may help out, a temporary solution maybe a small cooler with frozen 2 liter bottles and a pc fan sucking cool air from the cooler straight up if you have that stuff hanging around.
Click to expand...
I'm working on one now. I hope it works
 
D

donkeyshow

Well-Known Member
During the summer indoor growing kinda sucks unless you're willing to spend money on temp control. Like the others mentioned you can switch to running your lights at night, put in frozen water bottles. Really though you're only going to get as cool as the air youre drawing on. If the room your tent is in is 72, your tent will never get below 75.

Since you don't even have a proper in line / exhaust fan i doubt you're willing to spend on a decent ac unit. Just do the best you can til temps outside cool down. You'll still get some bud.
 
Taco740

Taco740

Active Member
donkeyshow said:
During the summer indoor growing kinda sucks unless you're willing to spend money on temp control. Like the others mentioned you can switch to running your lights at night, put in frozen water bottles. Really though you're only going to get as cool as the air youre drawing on. If the room your tent is in is 72, your tent will never get below 75.

Since you don't even have a proper in line / exhaust fan i doubt you're willing to spend on a decent ac unit. Just do the best you can til temps outside cool down. You'll still get some bud.
Click to expand...
I'm actually about to by a inline fan cause my cooling tube just came it. I was wondering tho, how many cfm' s does it take to cool a tent?
 
coreywebster

coreywebster

Well-Known Member
Need to know the size of the tent. Google grow room ventilation calculator to get a rough idea. If noise is going to be an issue buy bigger than needed and use a variable transformer to run it at lower speed. Match the filter to the fan size or go bigger on the filter to prolong its life and create less resistance on the fan.
Don't buy the cheapest thing you can find. There are lots of inline fans which are advertised as hydroponic that wont perform well. But there are lots of basic inlines that don't cost a fortune and work great.
 
Taco740

Taco740

Active Member
coreywebster said:
Need to know the size of the tent. Google grow room ventilation calculator to get a rough idea. If noise is going to be an issue buy bigger than needed and use a variable transformer to run it at lower speed. Match the filter to the fan size or go bigger on the filter to prolong its life and create less resistance on the fan.
Don't buy the cheapest thing you can find. There are lots of inline fans which are advertised as hydroponic that wont perform well. But there are lots of basic inlines that don't cost a fortune and work great.
Click to expand...
Thanks man. That was a lot of help. It said I need approximately 168 cfm's. I got another question man. Are these the inline fans you said are advertised as hydroponic but won't perform well?
 

Attachments

coreywebster

coreywebster

Well-Known Member
Taco740 said:
Thanks man. That was a lot of help. It said I need approximately 168 cfm's. I got another question man. Are these the inline fans you said are advertised as hydroponic but won't perform well?
Click to expand...
That looks to me like a duct booster. Not really made for the job of pulling through a filter.

You want something like this.
http://www.ebay.co.uk/itm/SYSTEM-AIR-RVK-EXTRACTOR-FAN-4-5-6-8-10-12-100-315MM-HYDROPONICS-/361428090774?var=&hash=item5426caff96:m:m3BJ7v87U-VqZtIswF8KqZw

In my experience a 6" in a tent that size will be slightly more than needed but after 20-25% loss on that type of fan it will work well.
Better to have more and not need it than too little and struggle in the warmer months.

Is your cool tube 6"?
 
Lordhooha

Lordhooha

Well-Known Member
Taco740 said:
Yea it's a 6 inch cool tube. I'm thinking about getting this one cause it has both, but if a 4 inch would work I would I might get one of those
Click to expand...
Get the six inch that way you can create a good negative pressure inside the tent to keep air flow moving correctly plus if you go bigger on the tent your not rebuying anything
 
You must log in or register to reply here.
Top