Can circulating fan be used at intake? (pics)

Pistols&Crystals

Active Member
I have a fairly large shed that I am going to use for a grow in a month. I am going to build a room inside (somewhere around 5'x7'x6' -1000w on a light mover and 8-12 plants) made of 2x4s and plywood. I was wondering if I could use a regular circulating ~10" home fan for my fresh air intake. My idea is to run ducting from outside the shed to the inside where it feeds into a sealed up box with the fan sucking in and blowing into more ducting which runs into the grow room (if this was hard to understand, check the picture). I am also thinking about doing the same for exhaust.

I am wondering if this would work, because in theory I feel it should. Anyone ever done something similar? It would be a cheap solution to other inline/exhaust options.

Here is a sketch-up of my idea
 

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stumps

Well-Known Member
Just want to make sure. Your venting out to the out side? those blade fans need to be sealed where they go in or out. If not you don't get any pull with them
 

FreNzyBud

Active Member
If you simply have your fan inside that box there you will not get much pull, if any!

I have used at fan like that in my first grow, take the fan apart, remove outside net/protective shield. Then mount it in a tupe with same diameter as the fan blades.

If you dont do this, you wont move much air.. And with 1000w bulb, you will need to remove some heat..

Or even better... Get a ventilator for a bathroom http://media.billigvvs.dk/ProductPictures/largethumbs/a5/Thermex-Silent-100CZ-Standardmodel-Hvid-203100.jpg


One for intake and one for exhaust, i got a fan like that in the picture for about 25 USD
 

Pistols&Crystals

Active Member
Most bathroom exhaust fans I've seen are about 100 cfm, which is not enough for my space. Am I going to have to suck it up and pay $100+ for a high cfm fan, or are there other options?
 
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