I have a question for you guys. I am starting a grow in a closet that is 2' X 6' X 8' in my basement. The problem is the basement is not on the central air system. THe room has one small window next to the closet. and the walls are concrete. How can I possible vent this small grow? Any suggestions, much appreciated.

What type of a ceiling are you working with? Is there a toilet in the basement or a 4" main in the basement?

-the Corsican.

__________________
My grow journal: http://www.greenpassion.org/f24/cors...st-grow-15533/

"The only thing necessary for the triumph of evil is for good men to do nothing." - Edmund Burke.

"If at first you don't succeed, it wont hurt to smoke a little weed!"

You'll need the window for your exhaust. Since cool air drops, the basement will have a supply of intake air. Use the window to exhaust a air cooled hood and put intake grills at floor level in the closet. If you have security issues, run the hood thru a carbon filter before you dump it outside. Peace.

Hi Zig,

Wouldn't dumping the exhaust out a window be a security risk?

I know there are a few people out there who are fortunate enough not to have to worry about FLIR but I think they would be in the minority. Most of us need to dissipate the heat or spread it out before venting it outside, if venting outside is an option at all.

Just curious, not trying to be smart ass or anything,

-the Corsican.

__________________
My grow journal: http://www.greenpassion.org/f24/cors...st-grow-15533/

"The only thing necessary for the triumph of evil is for good men to do nothing." - Edmund Burke.

"If at first you don't succeed, it wont hurt to smoke a little weed!"

I have the same set up and just exhaust the hot air back into the basement, with no problems. running 250 watt hid light

The only exterior risk is smell, that's why I suggested a carbon filter for flowering. A 250/400 HPS doesn't have a heat signature to speak of. A real dryer vent gives off 10x the heat. Recirculating it will work in cooler climates.
I saw a pic of this same basement setup and the guy used a plywood insert, painted it and the window black. He installed a 6" dryer vent kit, planted 2 bushes in front of it and sprinkled some lint around the bottom.... Sounded like a perfect plan to me.

Thanks, I think i'll try the black plywood insert. It's in the back of the house, so shouldn't be too much of a problem.

Pretty interesting zig. I figured a 400 would put out enough heat to be suspicious. I plan on (I'm thinking about it anyway) venting into a drop ceiling (with a carbon filter of course). I still have to find a more practical way of getting fresh air into my grow. I've also been thinking of the central air system but have to figure out where the fresh air comes into the house at (which duct).

I've heard of people venting into the sewer but you have to make sure you always have positive pressure so you don't suck up any methane and wind up blowing your house up. I wonder where that air would goto/vent at? Maybe down the street where the rain water drains?

-the Corsican.

__________________
My grow journal: http://www.greenpassion.org/f24/cors...st-grow-15533/

"The only thing necessary for the triumph of evil is for good men to do nothing." - Edmund Burke.

"If at first you don't succeed, it wont hurt to smoke a little weed!"

I've grown in many basements with only 1 window for vents. I like to use that window for a straight supply of fresh air (running your lights at night makes this supply of air better cooling than an AC per watt of energy), and tap into the house venting. You said you don't have central air in your basement, well do you have any sort of the house ducting running through the ceiling of your basement at all? Almost every basement allows you to tap into the houses main ventilation system. If you throw a carbon filter in your room along with an ozone generator in the ducting where you are exhausting, you shouldn't be able to smell anything. The hot air you exhaust into your houses ventilation will help to heat your home in the winter.

If you do not want to tap into your house's ventilation, another option is often a gas furnace exhaust line. These are generally 4" exhaust lines which will go from your gas furnace into a wall, and then up and out the top of your house. Make sure it exhausts high if you use this, otherwise you have to be very careful to ensure the air coming out is totally scrubbed of any smell. When you recirculate your exhaust back into your main house, smell isn't as critical, but if you dump that air outside of your house you must be 100% certain it does not stink.

If you want to be really creative, the best way to vent (in my opinion) is to find a wall which you can run a straight snap pipe (not flex) behind all the way up to your roof. You can put in a roof vent and run your snap pipe ventilation all the way down to your room. This can be tricky, and not every house is easy to set up this way. However, if you are dumping your hot, stinky air out of your roof you almost don't have to have odor control, as hot air rises and by the time that hot stinky air comes down its miles away. Also, running snap pipe at the same or bigger diameter as your fan will offer optimal exhausting. For example, if you had a 10" 1000+CFM exhaust fan, you wouldn't be able to hook that up to a 4" furnace exhaust and expect it to be running at 1000CFM.


good luck.

Ola bro.
If your house has electric heat, you won't have any outside air ducting in your house system, only gas system require outside air makeup and that is because of of the flames. Every house leaks air, in and out, infiltration is how a house system gets fresh air in a electric central system.
If you post a pic of your furnace I'll be glad to help you rig it.
A cool basement will absorb the heat of several lights before you create enough heat to need additional venting, luckily it wants to rise naturally so you just need to help it along. Personally, I think you gotta be banging over 2000w of grow before you need to even learn, how to spell FLIR. lol...

Hehe!

That's comforting (about FLIR) and good news to my ears. I'll take a pic of my furnace (it is a gas furnace) and you can tell me what you think. I was looking at the water heater and I think it vents to the chimney but I'm not positive. I have large ducts all over my basement. One half is a finished ceiling and the other is sheet rocked over. The sheet rock was screwed directly to the duct work.

Thanks Zig,

-the Corsican.

__________________
My grow journal: http://www.greenpassion.org/f24/cors...st-grow-15533/

"The only thing necessary for the triumph of evil is for good men to do nothing." - Edmund Burke.

"If at first you don't succeed, it wont hurt to smoke a little weed!"