2400w SEALED Room co2 need help scrubbing & ventilation

Hi everyone, my grow room is almost finished, but I'm kinda wondering what the best way to finish my ventilation.

I have a 6 x 12 sealed room with a walk in closet for the vegging. I have 2 aircooled -1000w hps lamps. I am bringing filtered outside air through lights and pulling w/8" inline fan and sending into another basement room. My veg room has a 400 w mh lamp that is not aircooled.
My question.. I have a large active air with 6" ecoplus fan to scrub the air. I also need to ventilate and scrub the air from my veg room so I bought a "Y" and am going to put this on top of the scrubber and send one side to my veg room. I am uncertain on where to cut the hole, on the top of the room, and then cut another hole to exhaust it out? Do I need any more fans for this to work? Do I have the inline fan blow "In" or "out" of the scrubber?
I am also concerned that this fan will pull all of the co2 out of the room and into my veg room.
Does anyone have any experience on how to do this? Please help, as I can finally get this 3 month project finished.

1. Pull fresh air through the hoods to cool the lights and exhaust it back outside the house. Therefore the hot air from the lights never mixes with the foul room air. I think you're already doing it that way but its a little hard to follow.

2. PULL air through the carbon scrubber (not push). Pushing reduces the filter's life span and it's overall effectiveness. Basically, you want the foul air to come in contact with the large pre-filter and the massive exterior of the carbon filter first.

3. Get a seperate fan that does nothing but pull air out of the veg room and into the flower room. This will circ the two rooms contantly. Having the Veg room use the Co2 also is fantastic. The #1 best time to use Co2 is during germination and pre-veg.

Thanks SR, I appreciate your fast response. I am so close to getting this done..getting excited.
1. I am aircooling the lights like you suggested.
2. Before asking the question about pulling or pushing air through the scrubber, it was about 50/50, your answer makes the most sense.
3. Ok, now this one is kind of confusing..it looks like all I need to do is buy another fan.. In order to have co2 in veg room..are you saying pull air through the Y off the scrubber, on one side of it blow into flowering room, other side send to veg room and make an intake hole, and then get another fan to pull it out? Since I have a 6" intake (I also have a 4" reducer if needed), what size of exhaust hole & fan is needed? I'm thinking you need a larger exhaust than the intake hole.. correct? And do I place intake on bottom of room, and exhaust at top? With a 435 cfm fan on my scrubber, will that be too much co2 taken out of my flowering room? (veg room is under stairs in a 5 x 7 room)

A simple 150-200 cfm fan (depending on the size of your veg room) sucking hot air out of the veg room from the top is all you need (and osc fans inside of course). That will create a neg pressure in the veg room, and flower room air will be naturaully pulled in. Make sure you exhaust somewhere away from the veg room so that the air can't quickly flow right back to the veg room. This circulation alone will be enough to dose the veg room with Co2 if the flower room is already saturated.

The Co2 is supplied to the flower room. It will leak into the veg room just by constantly exchanging that air. If you're actually plumbing the intake, it only need to be a passive intake. Run some 6" flex ducting in a coil to eliminate light leaks.

Not really a sealled room. You need to look into split ac or dual hose ac. They cool the room without changing the air.
I vent my lights on a closed circuit. Then use CO2, proper AC and a sulfur burner to control mold and fungus. That is a sealled room.
Do you have a PPM controller for your CO2?
In my sealled room I never bring fresh air in and I never exhaust any out.

THANKS SR, I will take your advice. I just bought the fan and installing it today.

Jeebus, I have a sealed intake that goes through the sealed light fixtures only and exits outside, so it is technically a sealed room, because I don't have outside air comprising the grow room. I probably wasn't too clear about that. Yes, I have a sentinel controller so I can measure the amount of co2 in the room. I have dehumidifier and but a/c isn't needed yet, as I live in a very cold climate. I have never used a sulpher burner as I've never done a grow on this scale. I had better do more research on how to use, any suggestions on it, do you use it on every grow?

thanks again and best grows to all,

jeebuscheebus said:

Not really a sealled room. You need to look into split ac or dual hose ac. They cool the room without changing the air.
I vent my lights on a closed circuit. Then use CO2, proper AC and a sulfur burner to control mold and fungus. That is a sealled room.
Do you have a PPM controller for your CO2?
In my sealled room I never bring fresh air in and I never exhaust any out.

Click to expand...

So you're saying the portable ac's with two hoses do not suck out the CO2 in your exhaust. Because I been trying to figure out how CO2 and an ac would work in a similar sized room.

fluffygrrrl said:

THANKS SR, I will take your advice. I just bought the fan and installing it today.

Jeebus, I have a sealed intake that goes through the sealed light fixtures only and exits outside, so it is technically a sealed room, because I don't have outside air comprising the grow room. I probably wasn't too clear about that. Yes, I have a sentinel controller so I can measure the amount of co2 in the room. I have dehumidifier and but a/c isn't needed yet, as I live in a very cold climate. I have never used a sulpher burner as I've never done a grow on this scale. I had better do more research on how to use, any suggestions on it, do you use it on every grow?

thanks again and best grows to all,

Click to expand...

Sulfur burners are great for powdery mildew. Also the HEPA filters are what sucks up and traps fungus and mold in the air. Also the sulfur burners aren't good to use in the last couple of weeks before harvest. It supposedly makes your herb taste like crap. Go to URBAN GROWER on Youtube, lots of lessons from many different growers.

For a sealed room, it would be best to use an "Ice Box" and a chilled reservior. That would replace an AC, and eliminate the need to duct an AC. If you live in a cold climate, you could place the reservior outside and you wouldn't even need a chiller. Mother Nature would handle that for you free of charge.

smokingrubber said:

For a sealed room, it would be best to use an "Ice Box" and a chilled reservior. That would replace an AC, and eliminate the need to duct an AC. If you live in a cold climate, you could place the reservior outside and you wouldn't even need a chiller. Mother Nature would handle that for you free of charge.

Click to expand...

The ice box is a cool concept. Im wondering if there would be any increased humidity from possible condensation. Do you use it or have seen it in use?

I've seen it running and I will install one on my setup when I redesign in a few months. I'm going to move soon.

Watch this video, it's very informative. http://www.youtube.com/watch?v=M0uRrMvfucY Packed with some excellent design ideas IMO.

Condensation won't be a problem as long as the incoming water is not colder than the dew point.
If your room is super clean and sealled your can even skip the sulfur burner. Just keep the humidity and temps in line.