Starting up a 600...

But this f*king heat might push my start up back a couple months, anyone here still running over summer in a tent? If so what do you use to battle to heat in phx?
I already have a 6in fan at ~400 cmf and a matching filter picked out but would this be enought to vent and cool a 4x4 with a 600 cooltube in it, or should I get a booster fan to cool the light and use the filter fan combo for the grow space?
Thanks for any help!!

Bleezyboy1990 said:

But this f*king heat might push my start up back a couple months, anyone here still running over summer in a tent? If so what do you use to battle to heat in phx?
I already have a 6in fan at ~400 cmf and a matching filter picked out but would this be enought to vent and cool a 4x4 with a 600 cooltube in it, or should I get a booster fan to cool the light and use the filter fan combo for the grow space?
Thanks for any help!!

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YES my 600 is doing fine i have a window open in the day and my temps are never above 80 you may need a air cooler of some sort depending where on this earth you are at

peace

I'm in the Valley in AZ... And my main question was if the fan filter combo I have would be enought to vent and cool the space I am planning, if not I'm gonna have to figure something else out or wait till it cools down here.

Bleezyboy1990 said:

I'm in the Valley in AZ... And my main question was if the fan filter combo I have would be enought to vent and cool the space I am planning, if not I'm gonna have to figure something else out or wait till it cools down here.

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I had a similar configuration. My exhaust fan with filter was ducted through the top of the tent. I added a 6" clip fan to blow over my canopy and a little 65 cfm inline fan that pulled in cooler air through a lower vent and was ducted toward the bottom of the tent. I never had any heat issues. I'm soil and did 9 grows. Each grow had six plants in five gallon buckets. Hope that helps.

i have a 4x4 tent with a 400, in my flower room with 2 1000. my day temps are usually 79-83 and my tent runs about 10 degrees hotter. I use a 4" fan /no filter to vent the tent from the top, no intake fans. my fan is resting on top, outside the tent so I can pull hot air from the highest point

my tent is veg-only so 90 degrees is ok with me

I would def get another fan to vent the tube, that's the point of the cool tube right? you gotta cool it! my 400 just has a crappy econo-wing reflector so your tent should run a bit cooler once it's hooked up

This is going to be a budget grow so ill do a dry run with the system, maybe even load up some of the coco and wet it down to simulate the pos humidity from watering. If the filter=6in inline fan=600w cooltube w/ reflector doesn't keep it cool enough then ill just spring for the extra fan, would a booster fan be okay to push air thru a cool tube? And if that's how I run it I at that point just hang the inline fan/filter from the top as exhaust?

use the stronger 6" to pull air past the bulb since that's what is generating heat. I would hang from the top like you said filter = tube = 6" venting out. if using a booster, I would put it at the bottom drawing cooler fresh air in. I just have a piece of ducting in the bottom corner that it can draw through that works ok for me

Always pull the air, never push it.

KAL EL said:

Always pull the air, never push it.

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+1

Your exhaust fan always needs to be bigger than your intake fan. If the tent is in your home such as basement or something, just duct the heat out through a pipe past a charcoal filter then outdoors. You dont even need an intake fan, static pressure will pull cold air in. But yes, have the air intakes be at the BOTTOM of the tent - hot air rises.

Also, you can use increased humidity to help manage temperatures. The moisture helps absorb the heat. The smaller the droplets the better - you want it to flash evaporate because that takes a lot of heat with it.
This concept is a bit counter intuitive to people because for people, hot temperatures + humidity = increased perceived temperature. This is not actually the case though, but it occurs because sweat is our cooling mechanism and it works by evaporating the moisture off our skin, taking the heat with it. In humid environments, its harder for the sweat to evaporate, so we feel hotter. Actually, we are hotter, because the sweat isnt cooling as effectively.

Though you may not need an intake fan, having a simple $20 walmart box fan at the bottom circulating air is a good idea to prevent hotspots from developing. I used a desk fan that would move back and forth, helped a lot.

Also, Sativas can take a lot of heat before having problems. Up to 85 would be okay, any higher and you are risking problems. Some sativas thrive at 90 but those are few and far between.

Good luck! Heat is the biggest problem growers face here in AZ!

For the life of me I can't seem to find the threads here but I've seen a few stating to put the fan after the filter as to pull air but before the light because the heat it produces can burn up or seize up the fans bearings? But I just gotta get the equip and see what it does. Gonna be a sad day if I have to rig up separate vent systems but ill do what I have to thanks and +rep to all who helped!!

my 8" fan pulls the heat from 2 1000's no problems. And I keep the fan itself in the attic where it's also hot

Bleezyboy1990 said:

For the life of me I can't seem to find the threads here but I've seen a few stating to put the fan after the filter as to pull air but before the light because the heat it produces can burn up or seize up the fans bearings? But I just gotta get the equip and see what it does. Gonna be a sad day if I have to rig up separate vent systems but ill do what I have to thanks and +rep to all who helped!!

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The sequence is filter--ducting--light in/out--ducting--exhaust fan--ducting to the upper most vent. I used an 18 x 5 filter that was rated at 40 cfm and a 265 cfm exhaust fan. For the bottom 65 cfm inline fan i used for cool air intake had ducts on either side to eliminate any light leak and placed in the lowest vent of the tent. The filter cost about 50 bucks, the 65 cfm fan was 50 bux, and the 265 cfm exhaust fan was 98.00. I think the ducting was $20.00 and the little clip on canopy fan was 25 dollars. I have a head injury from a motorcycle accident and my brain was scrambled...I forget things...so if i post something that is confusing please let me know and I will gladly clarify.

When I get all the sheet ill post pics of it set up and during/after the dry run!!

So I set up the whole grow and am 2 weeks in! The grow is in my sig, go on and check it out and comment you guys!!

Bleezyboy1990 said:

For the life of me I can't seem to find the threads here but I've seen a few stating to put the fan after the filter as to pull air but before the light because the heat it produces can burn up or seize up the fans bearings? But I just gotta get the equip and see what it does. Gonna be a sad day if I have to rig up separate vent systems but ill do what I have to thanks and +rep to all who helped!!

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Yes the heat is harder on a fan and pulling air through lights also sucks for smell containment. I agree with the engineers at Can Fan and always push the air through lights.
http://www.canfilters.com/faq.html

My vent. Setup is filter-->fan-->light-->outside but will soon try for a dedicated vent system for the light and one for the room. Thanks for stopping by and leaving good info check out the journal if you would like! It's in my sig.