Heat Problems? Exhaust Or Intake Or Co2 or Portable A/C?

I'm currently having an issue with heat in my 4 1/2' x 4 1/4' x 7' area A. I have two fans in the room but no real intake and no exhaust, there is currently no ceiling at 7, and is open another foot or so above that. I have the veg area B next to it completely enclosed at roughly the same dimentions next to it, using poly 5.5 ml as the walls. I went with no ceiling for now being it was hot without one. The RH is around 50-60 depending on if I watered or not.

I'm looking for the best solution I was reading that you could get into the temps of the high 80's easily with Co2 added, but I would rather have the room at temps in the 75's F if I can.

I'm looking at all options at the moment, and trying to find the most cost effective solution.

What suggestions, do you guys have, and if I lower humidity will the heat go down, or just be a dry heat?

Id take the co2 route only if your running high wattage Lights

Dohhhhhhhh.. forgot to mention what light I was using its a 400w HPS with built in ballast, I know it sucks, wish I had the money for a seperate balast but you you know. When I do a light upgrade I'll def go with something that can be vented at the hood.

Its a sunburst switchable all in one unit with a hortilux 400w HPS.

just put an exhaust fan in.

Essex said:

just put an exhaust fan in.

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I only have two real options to exhaust to, the attic which is hot, and the roof is very short on vents, I'd have to run it 24/7? Or cut a hole out into the crawl space, and exahust down and out.

Essex said:

just put an exhaust fan in.

Click to expand...

I would vent it to the attic. It is not going to get your attic any hotter than it already is.

If you can

Just exhaust into ya attic it dont matter if its hot in the room ya push hot air into, the negative preasure will suck cold air from any gaps in doors windows etc.

Ya dont have to run 24/7 ya can just run when lights are on to keep temp down.

Yeah thats what I'm leaning twords now, just not sure how much it will drop temps depending on what kinda fan i put on the end of the duct. Sound isn't to big of an issue, I'm kinda think of some mcgyver solutions really don't want to drop the coin on something local.

I know this is going out on a limb, but hell why not, if i created some sort of reducer with say carboard on a large box/window fan, to say a 6" duct that I'll probably need anyways would it be worth the effort, or am I better off comming up with the 110$-170$ for a good fan.

e-bay! job done, I use 2 x TT fans and there ok for the money.

I got a 4" TT with duct and carbon filter for £60

Oh if ya realy cheap ya can use a moded "stanley blower" for about $30 if ya can find 1 local

Little off topic, but I think I'm the only one that dont' use Ebay. lol I kinda need something by monday. But thanks Essex I appreciate the feedback, much appreciated.

I did find a inline fan local for about 60$, but I don't know if it will move enough air, and being the forgetfull person I am, I don't remember what the CFM was on it, I think it was 380'ish maybe. The higher priced ones I was looking at was like 435-480 CFM.

380cfm will be plenty! I use 2 12cm PC fans to cool a 150w MH

Don't vent into your attic, thats bad. Contractors put up vapor barrier and use acoustic seal and tuck tape it for a reason.
Go straight outdoors through a window under a deck or something if you have that option. Chimney too is possible if your not using it.
Whatever you do, into an attic is bad.

I have a few contractor friends I'll consult on the attic vent for sure. I'm not one to jump to anything, I tend to think things out quite a bit, if not to much before I attempt something. Exhausting straight outside raises the concern of smell outside the house, inside the house smell isn't an issue, outside dont' want to draw any attention to a continous herby aroma outdoors.

just add some vents to ya loft,

The loft space can be ventilated in a number of ways. Special vents are available for insertion into the soffits (the boards immediately under the fascia boards supporting the gutters). Or special tile vents can be found at a builders' merchants; these can be used to replace existing roof tiles.

You can make your own vents by cutting holes in the soffit boards with a jigsaw, then covering the opening with a fine rustproof mesh. Add a simple quadrant beading to secure the mesh and make the job look neater.

Every house should have soffits and vents, well as far as my experience goes. But your attic is suppose to stay consistent temperature with the outside air.
I guess if you live somewhere where its stays relatively warm, but up here we got -30 C winters, thus causing condensation and mold.
Just gutted my grandmas house and seen 1st hand what what it looks likes, her house is like 40 years old and the vapor barrier was super thing and torn apart, then ceiling started to droop and let more air in, it was horrible.

Even if you do vent into your attic because your climate allows you, the smell will get out without a carbon filter anyways.