Need a ventilation guru!!! Please help!!!

[paperchaser825]

:rastasmoke: ok........keep in mind....hydro system...in a closet about
5'x2'(deep)x7'

have a dr60 grow tent (2'x2'x4'7''), the tent has passive air intakes at bottom for cool, clean air...getting a cooltube (19") (due to height constraints)...have a vortex (4" 172 cfm) fan that exausts to attic...planning on flowering here...have 4" filter that i want to chain in this order: filter>duct>cooltube>duct>exaust

I am pretty much set on getting a cmh (ceramic metal halide) lamp for the grow just because of the ridiculous spectrum...it's quailty not quantity here.

I want to go with the 400w cmh....(approx 34,000 inital lumen, 29,000 lumen mean).

I plan on flowering only 1 plant in here.

My questions are:

1. Can i use this 400w lamp in this situation? or is the lamp just over kill for 1 plant?

2. If yes, do i need to upgrade my fan?

3. If none of the above, any suggestions that would make this work???


Thanks in advance. :hippy:

[paperchaser825]

ok, just thought of another thing...:rastasmoke:....would using one of these help me any? .: Sunlight Supply - horticulture and aquarium lighting systems :. Website (http://www.sunlightsupply.com/product.cfm?sid=B730F8FFEA1C99E8C8A801FC8B792F8A&p=1186&cs=products%2Ecfm%3Fsid%3DB730F8FFEA1C99E8C8A801FC 8B792F8A%26c%3D56%26kys%3D%26pgi%3D3)

[stinkyattic]

I think that your initial setup is about right, but you won't be able to run much of a filter on a <200cfm fan. Try a 4" OdorSok.
Your setup will work best if you train your plant to lay rather flat and wide until you flip to flower, and then just let her grow.
I suggest starting 3 plants so at least you have a really high chance of at least one female.

[paperchaser825]

So the odorsok is more cfm flow?

[thatsmefiend]

as far as your venting goes... your closet is only 70 cu ft...so 172 cfm is plenty. You might need a secondary fan for the intake... to bring a 172cfm of fresh air into the closet/tent it is. So the pressures are equal.

I don't really understand how the cooltube works. Why do you need to duct the cooltube? so the supply air is cold?

for the exhaust part it should be...

duct>filter>exhaust

but im guessing your way could work too...