C02 is ONLY beneficial when ALL OTHER aspects of your grow are on point... Meaning you need to have every other aspect of your grow 100% dialed in before you will see ANY benefits from C02. Not really relevant but I thought it worth mentioning

I see what your saying, but,

A sealed room is a basic requirement for proper venting, enviro control and odor control, CO2 or not, sealing still needs to happen.

However I think it would help if you though of CO2 as an enviroment additive rather than try to use it as a mechanism of air replenshiment.

I understand C02 to be absorbed very rapidly by the plant, in other word C02 does not need a long time to linger with the plants to do it's thing, therefore venting can still happen with C02 additions and it all works.

I've been reading about some really nice C02 controllers that will either shut down your vent dampers or your vent fans, squirt some C02 and than fire up the venting again; the point being here is that the system still relies on venting.

Ultimately I think you will find that you'll need to vent your grow chamber to shed the heat accumulation and supply fresh cool air.

Kayuman

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My life is like a blind discus thrower,
I'll never set any records,
But I'll sure keep the crowd on it's feet...

Yeah 420OldSchoolDJ420 brings up a very good point. Get your temp, humidity,air, lighting and feeding down before you venture into the C02 realm.

This is obviously a new build, as you fire it up you will find all sorts of tweaks and adjustments will need to happen to get the basics levelled out.

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My life is like a blind discus thrower,
I'll never set any records,
But I'll sure keep the crowd on it's feet...

Check this out. I just posted a thread about it.
http://www.bestgrowlights.com/site/4...duct/SSI904490

if that doesn't work it's called the "hydro innovations ice box"

I have no idea if it works, but it's a cool Idea. Still waiting for feedback about it.

Now that is really cool I like it.

Looks like a shit load of equipment and hoses though, which could be challenging in a SCROG.

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My life is like a blind discus thrower,
I'll never set any records,
But I'll sure keep the crowd on it's feet...

Yea, it seems like it may be a little much for a small grow, but if you had a big opp it might be worth it.

Alright yeah I think I am just going to vent it good, I have had to many problems with heat in the past.

So what would be the best way to vent this room out and keep it cool?

choose your weapon - http://www.plantlightinghydroponics....-c-76_629.html

I would shorten the duct work and maybe get the ambient ttemp of the intake room down somehow depending on your location

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Current Grow 8/20/09: http://www.rollitup.org/grow-journal...ple-widow.html

Have you measured the intake and exhaust temps for your light? Fairly certain that Al B. Fuct said that anything greater than a 6 degree difference means your light is heating up your space and you need to increase CFM or straighten out ducting.

I feel you on the CO2/heat battle (see my journal). You'd probably have to install an AC unit to keep it sealed (recirc window unit or dual hose portable NOT single hose portable) or vent the room. I made the mistake of purchasing a single hose and had to return it and get a dual hose.

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