Closet venting Issue

Hi,

Setup:
250w HPS
3'x3'x5' grow closet (black outside/mylar inside)
Exhaust fan w/carbon scrubber (forgot the CFM, but its more than enough)
White widow, auora indica, blackjack (1 of each)
All of this is in a closet that's 3'Wx 6'Lx 8'H and can be closed off by a door.

I've gone thru a few grow cycles, but the one I'm currently on and the last one has been in a new location. The last one was during winter so temp wasn't too big of an issue, but now I can't keep the closet door shut or else it gets too hot. I need to keep the closet door closed for stealth concerns.

I was going to just cut a hole and vent to the attic, but I realized the crawl space above this closet is only about 6-8in. So I can't get to it. I can't really change the closet that it is in.

Any ideas?

Thanks!

smallgrow123 said:

Hi,

Setup:
250w HPS
3'x3'x5' grow closet (black outside/mylar inside)
Exhaust fan w/carbon scrubber (forgot the CFM, but its more than enough)
White widow, auora indica, blackjack (1 of each)
All of this is in a closet that's 3'Wx 6'Lx 8'H and can be closed off by a door.

I've gone thru a few grow cycles, but the one I'm currently on and the last one has been in a new location. The last one was during winter so temp wasn't too big of an issue, but now I can't keep the closet door shut or else it gets too hot. I need to keep the closet door closed for stealth concerns.

I was going to just cut a hole and vent to the attic, but I realized the crawl space above this closet is only about 6-8in. So I can't get to it. I can't really change the closet that it is in.

Any ideas?

Thanks!

Click to expand...

I have one. The space between the bottom of the door and the floor should be big enough for passive intake. We just need to get the air exhausted out. Even though the crawl space is only 6" - 8", that should be sufficient to allow the exhaust air to move on out. The device I'm picturing below is a through wall fan that is designed to allow air from one room to pass through a wall to another. In my grow room/closet, an adjoining wall is to my master bathroom. So I installed the fan to blow the closet air into my bathroom.

If you are not able to do something similar for stealth reasons, you can install the fan in the ceiling, without ever having to get up in the attic. Just trace the duct, cut, insert, mark screw holes and install anchors and voila, an exhaust fan. I plugged mine into a timer shared with my intake fan so they come on at the same time. If you need to create negative pressure to keep the smell from entering a room or hallway, just plug the fan into a 24/7 power strip.

Good luck!


EDIT: I forgot to add, the fan is About $50 and is only sold at homedepot.com It is not available at their hardware centers.

Thanks for the reply! That looks like an awesome idea. I might even use it just to help circulation in that room (I boarded up the window to control noise for my musical instruments).

After looking around in the attic I noticed that the roof came down to 6-8in, but behind it there was more room (the wall butts up to the garage), so I managed to cut a hole from below and shove my fan and ballast up into the attic. The temp has already dropped 2F and its been less than 5 minutes.

You can snake an exhaust line starting from the part of your attic with enough room to work in to the area where you've cut the hole. Use a string on a pole to get to your exhaust hole, then pull the string through the hole, attached to your ducting.