Whats the best way to cool your room while using co2?

I'm doing a major remodel and expanding my room. I am using co2 and want it to stay in the room. My thoughts were a 24,000 btu window/wall a/c. Area is 800 sq ft. Running eight one thousand watts and venting them all. I am getting one more 1000 and getting light movers. I flood the room with co2 now every three hours (with a propane burner), and exhaust the stale air before each flood. Should I stick with the wall a/c or do the portable a/c with two tubes be a better choice?

Window unit cost about 700. The two portables it would take to match it could cost twice as much... Does the window unit circulate inside air, and use only outside air to cool the unit? I know single tube portable a/c use inside air to cool the unit and blow it out with all the precious co2.

you've got it right, all a/c units are basically heat pumps. i wouldn't get portable units unless you had to; they are the most inefficient. window a/c units are great but they have their issues too. some aren't 100% sealed and odor can leak outside. if a little odor is not an issue then you'll be fine. not all of them leak but some do because they use a single fan but they wouldn't leak enough co2 for it to be an issue. window a/c units only use outside air to cool the coils so you don't need to worry about anything getting in the room. i would recommend a minisplit or water cooling. you are talking about a bumfuck load load of lights man. i'm not sure if you have ever done a grow this size before but you are gonna have some serious cooling needs. especially if you have your ballasts, dehumidifier, and any other equipment in the room that makes heat. i'm not sure what the climate is like where you live but even with air cooled hoods that are exhausted outside i'm not sure 2 tons (24,000btu) will be enough. what you don't want is an a/c that runs all the time cause that is really inefficient and hard on the electricity bill (not that it seems to be a problem with 9000w of light) or you install an a/c and find out you don't have enough cooling. honestly, i wouldn't suggest anything less than 3 tons and if you have dehumidifiers and ballasts in the room you probably need a 4-5ton (dual minisplits). just my opinion man.

http://www.ideal-air.com/products.aspx

http://www.youtube.com/watch?v=_JOhOJVnjQ4

lg split system i lov them

pexsupply.com $1800

ahh yes, i forgot about commercial portable units. they are really expensive though but if you need to have the unit in your room then they are the way to go.

KwiKool is another company that makes commercial portable units up to 12 tons i think.

It is a lot of lights, I have a very dense canopy and large plants. Ballasts are outside the room, I have fans running air through the lights, and out of the room. This is my 4rth crop. My best and largest. Last one I got 8oz out of my biggest. I wasn't using a high enough nutrient solution, so I doubled it, added co2 and the biggest plant is almost double the size. My colas are bigger now than last harvest and I have 3 weeks to go... I'll check the split system. Thanks for the advice! I can properly seal a window or wall unit, and water stink isn't a problem... I use a lot of fans to circulate air.

Also, right now with the co2 burner, 8 lights, and dehumidifier, 3 little window units keep it under control, barely. That's 15,000 btu...

cylanoid said:

Also, right now with the co2 burner, 8 lights, and dehumidifier, 3 little window units keep it under control, barely. That's 15,000 btu...

Click to expand...

but summer is coming. i'm guessing you are in a basement since it's 800sq.ft. don't know. either way it's still winter in oregon. when the summer comes you may find that 15,000btu isn't enough. if you are cooling 8 lights with it right now you have got to be somewhere where it's pretty darn cold out still. it takes me 8,000btu to cool a 2,000w 64sq.ft. space.

Exactly, that's why I figured the 24,000 BTU would work. My shop is insulated, I run the lights at night, and shove a lot of air through the hoods to keep the bulbs cooler... I just wanted to minimize co2 leakage. I survived last summer with this thrown together operation.

You want to make sure the unit has two COMPLETELY seperate chambers...like in the video above...one chamber for the air in the room...and another for the air exchange/exhaust to cool the unit. A lot of people make the mistake and assume all dual hose units have seperate chambers...that is not the case. They pump the room's air out with the exhaust...some units include a carbon filter so people assume the unit must be sealed since they can't smell anything...but the unit is, in fact exchanging the room's air. Good luck in your search...Ideal-Air units are beasts.

I would also recommend installing some insulated partitions...or building a room inside your room...800 sq ft is a huge area to try to cool...12 x 24 is bigger than you will ever need for 8k...and that's only 288 sq ft

Those dual hose portable leak are not effecient at all. If budget, go window shaker, got the cash go mini split or better yet excel split system