Air cooled hood

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Gastheblast

Well-Known Member
Hi all a recently purchased a air cooled hood to fix my temps. I have my 6 inch inline fan outside the tent blowing air through the hood too a vent outside. Thing is now im still dealing with 85 f temps. Wondering if it be better to be sucking the heat out rather then blowing it through15960447914073072170203690036407.jpg
 
lime73

lime73

Weed Modifier
Yes suck heat out of tent. I run carbon filter inside tent with line going to hood than out of tent. Neg pressure. Pulls heat out of tent and cools hood at same time.

Way you have it is just running air through hood and out...is you fresh air at top of tent if so run fresh air low in tent , not at top
 
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Gastheblast

Well-Known Member
lime73 said:
Yes suck heat out of tent. I run carbon filter inside tent with line going to hood than out of tent. Neg pressure. Pulls heat out of tent and cools hood at same time.

Way you have it is just running air through hood and out...is you fresh air at top of tent if so run fresh air low in tent , not at top
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K ty. Thats how i wanted to do it but alot of sites say its bad for the inline fan. What you mean by fresh air. All i have for fresh air is one of the bottom holes i put some ducting to counter the neg pressure
 
lime73

lime73

Weed Modifier
Oh ok that's your ehaust fan at top?

How is it set up exactly, where is inline fan going, how is lines to hood set up.
What size is it? Cfm?
 
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Gastheblast

Well-Known Member
240 cfm. Its a 6 inch duct booster. Im using my inline 6 inch for the hood but im open to any sugestions. A diagram would be great if possible. Im french so my understanding of english is horrible lol
 
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Gastheblast

Well-Known Member
Everything goes outside of the tent into a vent outdoors. My inline is set up outside the tent on the left blowing air through the hood out to the other side of tent
 
lime73

lime73

Weed Modifier
Pulls heat out of tent and cools hood.

Neg pressure.

Yes use other fan for fresh air intake...separate from exhaust.

Edit : clarify.
 
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OldMedUser

OldMedUser

Well-Known Member
Gastheblast said:
So i wont need that duct booster fan this way. You think i should use it to bring in some fresh air from outside the grow room
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Don't use that booster fan at all. Just passive intakes is plenty as long as you have enough open so you don't suck your tent inside out. I'd use some sort of filters on the intakes too so critters and other nasty things don't get in.

@lime73 has his set up properly and I assume the exhaust goes outside like it should. You should pull air thru and not push it. Then if there are any leaks air is getting sucked into the exhaust stream and not forced out into the tent.

:peace:
 
M

MB-Kush

Member
if you have A.C you could run that booster fan from the vent into the tent, I'm forced to do this because it just gets way too hot otherwise. I will be removing that setup once the weather cools down a bit.
 
OldMedUser

OldMedUser

Well-Known Member
Gastheblast said:
Its 1000 watts have it about a foot now seems safe
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A foot is pretty damn close for a 1000W. I only run mine that close when it's riding on my Light Rail 4.0. Two ft is good and 18" if you're pushing it. Even with the glass on your hood there's a lot of radiant heat and infrared that could easily bleach top leaves and buds and will for sure cause some some level of heat stress. I use a laser thermometer to check leaf temps these days and at a foot with no motion they can get well over 100F in a very short time. Lots of air flowing between the light and tops helps but should the fan be off for some reason they will fry.

I've only run HIDs in later veg and for flowering for the last 20 years and have 3 - 400s, 3 - 600s and a couple 1000W.

Gastheblast said:
You think i should updrade that carbon filter to a 6 inch? Cause right now it has that adaptor .you think it will break my inline fan?
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That's a lot of vacuum in the line using a 4" filter and I'm assuming that your 6" inline is around 400cfm. A cheaper option is to get a speed controller and run the fan at half speed so it's not working so hard. Mine also has a temp/rh controller so it only runs when it's told to.

If you plan to keep growing then you would be better off buying a 6" to reduce the restriction and get better airflow and odor reduction. The slower the air passes through the carbon bed the better it catches the stank. I bought a 6x26", 600cfm filter a few years ago and never got around to using it. The guy at the hydro store had a good idea that he says a lot of people do. Get a bigger filter like I did and wrap the bottom half with plastic wrap so it's basically reduced to 300cfm then run the fan at half speed so around 200cfm and then when you can start smelling the exhaust more take the wrap off and wrap the top half. Should last 5+ years depending on how big you grow. Could last longer if you're not filling the tent for 4 grows a year.

:peace:
 
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piratebug

Well-Known Member
I always keep my CF filter separate from my hood because the way you have it won't maximize the cooling of the grow space because you are cooling the lamp with heated air from the grow space, not with actual cool air that should come from the outside of the grow space. I do mine like so.... on one side of the hood I run a vent / ducting to one of the tents 6" - 8" openings, then I put a filter on that end, I use one of those thin brown Frost king filters, then on the other side of the hood I put my cheap 240 CFM booster fan sucking air outward from the hood, then I vent that to the outside, as that is the best way to maximize the cooling of your grow area when using a enclosed hood!
 
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