Intake question

**TedNewget** · 04-12-2010, 11:11 AM

So I am trying to get my room set up the way it needs to be because I am getting 3 more plants that are ready to flower in a couple days. I am using my finished attic with a small window at each end and am looking to get some fresh air moving through. Am in the process of setting up exhaust but am wondering about intake. Should I get some kind of fan and put it in the window? If I do this, will it bring pollen into my room during the season?Any suggestions are appreciated! Thanks!!!

**vh13** · 04-12-2010, 11:41 AM

Most growers take care of their males, but occasionally I hear about someone who does need to filter their intake because of some asshole nearby. Breeders don't let their pollen escape. A filter shouldn't be necessary.

That being said, I do filter my intake for my flower cabinet. Keeps the bugs out too.

An intake fan is not necessary if you have a sealed room with a strong enough exhaust to build up negative pressure in the room, but an intake fan will increase the efficiency of air flow. Without a fan, it's called passive intake, because it relies on the exhaust fan to pull air in.

More important then an intake fan is a circulating fan, something blowing around inside, preferably oscillating, that blows directly on the plants to keep air from being stagnant under the leaves.

**TedNewget** · 04-12-2010, 12:33 PM

Ok thank you I will just put an exhaust fan right into the attic and I already have an oscillating fan in there. The room has a vent from my central air up there so if I leave that open it should stay cool up there. The light that I got doesn't have the glass on the bottom, but it does have the hood with the holes on each side. Do you need to have that glass on there to make running the exhaust thru the light effective?

**vh13** · 04-12-2010, 02:05 PM

Originally Posted by TedNewget

Ok thank you I will just put an exhaust fan right into the attic and I already have an oscillating fan in there. The room has a vent from my central air up there so if I leave that open it should stay cool up there. The light that I got doesn't have the glass on the bottom, but it does have the hood with the holes on each side. Do you need to have that glass on there to make running the exhaust thru the light effective?

No, glass is not necessary, but it increases the efficiency of cooling the hood and directing heat away from the plants, which allows you to bring the light closer to the plants... which they love.

You'll want to run ducting from your exhaust fan to a hole on the hood, to pull air directly from around the bulb first. If you can run ducting from one window, to the hood, and back out you'll isolate the air space and eliminate almost all of your heat most efficiently; if you do, you'll still need another exhaust fan for the room itself, to get fresh air in. The second fan can be smaller, plants need to breathe but not as much as they need proper temperatures.