Whats up guys new to the fourm and have a quick question on lighting and envirometal controlls. I have a 10 by 10 grow room with 3 600watt HPS lights. I need to vent the room for heat and humidaty issues. What would be the best size blower and exhaust fans to use? also when cooling the lamps should i run the fresh air thoutgh, or run the exhaust through the lights out of the room? Also what is a good cheap Env. Controll box? Do I need one? Dehumidifiers, any one that I should use?

I live in Colorado so we have cold winters and pretty hot summers do I need a heating and cooling system for the room its self? Its set up in my basement and the temp is usually pretty cool... 68 to 75 usually?

you can save yourself a lot of time and energy if you just cool the lights with air cooled hoods like cool tubes instead of letting them get the grow room hot.

200 to 300 cfm would be plenty if you ran them inline.

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Right on man. I have herd horriabe things about the cool tubes. And the light area they cover just seems like its smaller than say a easy cool 6 or 8. I have 25 plants veging now and need my lights in about a month. right now I just have a room constructed with my MHs and a table with 25 seedlngs. what would be a good setup for air movement. an in and an out or 2 out? whats the best set up? do i need an env controll unit? this is my first crop I am a medical marijuana pataint and care giver for sevral people and just need some help man. I have done all my reading and homework but none of the books or dvds really give much usuable when it comes to moving air or what type of env to use or anything so I feel like I am flying blind a bit.

Yea, I have herd people talk shit about cool tubes too. Its the small reflector thats put inside the glass tube that people don't like. You can just remove it and use other reflective material if you like. I got the real deal and I made my own for my cabinet. But yea, any air cooled reflector will be good.

You have a 10x10 area and want some ideas? Check out GTOs journal he sectioned off part of his garage and built a room thats pretty cool.

Organic Montana Medical Grow

I do not consider his room the most efficient way but it works.
He is in Montana cold winters and hot summers too.
But he is only growing his legal limit.

I have read hundreds of journals, I learn something most every time.

Air movement. Whats important to remember is the more plant material you have the more CO2 they are going to use. Fresh air has 300ppm of CO2 in it naturally. CO2 is heaver then air so it is low to the ground. What you want to do is get air from outside in one side of your room at about knee height. Have a couple small oscillating fans blow the air up under the leaf where the stomna will take it in and make oxygen. Then on the other side of the room at the ceiling you go out. This is for the plants environment.

You should vent your lights almost the same way. air from outside through a vented hood and back out but both can be at ceiling height.

This way you can control the environment. Control the Temperature, humidity and add supplemental CO2. This can be done manually or with a controller. Its nice to have it automated but not necessary. You can get it close.

If the same fan cools your lights and your room you will run it quite often and will never be able to control the environment. you will have almost zero humidity and a constant 300ppm CO2

So, when you ask what size fan do I need it depends on what you are going to do with it. 4in in line fans are about 200cfm. Fans are more effective pushing air then pulling it. So the fan on the lights would be pushing it past them and the fan exhausting the room would be where it actually goes out of the room. You don't necessarily need a intake fan, just fresh air at knee level.

Squirrel cage fans are cheaper and move more air then in line fans but they don't move the air very far.

At minimum I would get a 200cfm in line and use 4 in ducting to cool the lights, right at the exhaust outside I would add a duct booster. Then about the same (200CFM) for the environment but squirrel cage type for exhaust if it is just going through a wall.

I made plans for a room I plan to build if I ever get the space. Light hung vertically and plants in a stadium grow. two flower rooms on a flip flop switch so the ballast never turns off. One room on 12hrs then the other. No power surge every 12 hrs. Much more efficient.

I will look and see if I can find it.

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Yea, Here it is.



Cool huh?

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Right on dude. fly set up, hope you get the space to do it! Thanks for the words of wisdom man I cant wait to get back to CO and start setting up my stuff. I do have a question on the co2 systems.... How the heck do they work? does it just pour co2 into the grow rroom?

Yea, sort of.

Plants require a minimum of 300PPM of CO2 and they get that from fresh air.
Thing is If given more CO2 they will produce more as long as you have high def lights like HPS. They can take as much as 1800PPM.

Two ways to do it. One is a unit that burns propane and releases CO2, the other and more common for small rooms is a CO2 tank and regulator thats on a solenoid. Like a 40 gal. tank. You can use on line calculators to tell you how long to release it and most grow rooms have it on a timer. Fill with CO2, then bake with lights for a couple hours then exhaust the heat and the CO2 and get fresh air. cycle twice when lights are on and off when lights off.

Good luck.
.

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Waterfarm (completed) Cabinet to Waterfarm (completed) Nute Challange (completed)

LED/T5/400W Cabinet (completed) Dual Cabinet Build (current) Dual Cabinet Grow (current)