NEED HELP CHOOSING EXTRACTION!!

CARmick93

CARmick93

Active Member
New grower here, I’m in the process of setting up a grow area and am wondering what extraction I will need.

The area is 2.5 metres x 2.5 metres and the height is 1.6 metres (in the loft). I am thinking of buying a RAM 6 inch inline twin speed extraction fan along with a 6 inch carbon filter that is 600mm long (24 inch) the fan has a 517m3/hr rating. Was just wondering if this will be enough??

I also have a 4 inch rhino fan to bring air into the grow area and heat shouldn’t be too much of an issue as I’m using LED lights.

Any help is much appreciated.
 
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Apalchen

Well-Known Member
I converted over to feet so that's roughly 8x8x5. Which comes out to 320 cu ft. Ive never heard of the brand of fan your talking about what's the CFM rating and can you post a picture or link to it. Make sure it's a true inline fan and not a duct booster. Lastly how many watts of led are you using and where is the intake air coming from?
I've primarily used hid lighting so for anything bigger than a 4x8 I start looking at bigger fans, you might be okay with a 6 but if I was building out an 8x8 id prob use an 8 inch fan.
 
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CTGrown203

Well-Known Member
Ac infinity has the best extraction fans hands down don’t care what anybody on here says look em up let the specs speak for themselves but they are alittle more money, if u want cheaper don’t really matter go for one that’s pmw controlled better flow, quieter, and more efficient
 
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CTGrown203

Well-Known Member
Depending on where ur growing will matter if ur in ur basement that 4 inch should work if ur on second floor like me ur gonna need that 6
 
Renfro

Renfro

Well-Known Member
CARmick93 said:
Just googled it there and the cfm rating is 304.

I have 2 mars hydro 2000w lights and the intake is coming from the room below the loft so I can leave the window open slightly for fresh air to get in.
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Thats a mixed flow fan type so it won't deal with static pressure losses like carbon filters or ducting as well as a centrifugal will so you will wanna oversize it.
 
Weouthere

Weouthere

Well-Known Member
Ac Infinity T6 is what I just got. Quiet until about setting 5-6/10. Super easy to set up and program. Would recommended highly
 
Renfro

Renfro

Well-Known Member
Things to consider when getting a blower.

1) Ducting. How much, how many bends, what type? Ducting can be very restrictive, especially the accordion duct. Any bends add resistance. Carbon filters will add resistance. These things will cut the CFM, not so much on a centrifugal blower, kinda in the middle on a mixed flow and an axial fan won't work at all.

2) Noise. Centrifugal blowers move the most air despite resistance but they are loud. You can oversize them and the ducting and run them on a variac to slow them down, this will reduce the noise and you still have the power available if you need it.

3) Odor. Carbon filters restrict flow, larger is better for this reason.

I really avoid mixed flow and axial blowers because I am buying it to move air with the limitations of ducting. I prefer centrifugal blowers for that reason but I don't care about the noise though. Using nice straight runs of galvanized snap seam duct will allow for max flow and will cut the noise a LOT.

So it's important to consider how you will run your ducting and how restrictive this will be.
 
Nizza

Nizza

Well-Known Member
if you want to maximize on efficiency look at dryer or flue exhause designs, the best vents always have long sweep 90's or just 45's and minimal bends. they have a straight run off of each side of the blower for 5-10' too
 
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Apalchen

Well-Known Member
I can tell ya from experience you will always wish you got the bigger one. People almost always upgrade and need more so if you already have it by twisting a dial that's one less expense to adding more watts to the area if needed. Cause a upgrading to bigger fans usually means bigger filters it can get costly.
 
Renfro

Renfro

Well-Known Member
Apalchen said:
I can tell ya from experience you will always wish you got the bigger one. People almost always upgrade and need more so if you already have it by twisting a dial that's one less expense to adding more watts to the area if needed. Cause a upgrading to bigger fans usually means bigger filters it can get costly.
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YES! Nobody ever says, damn I wish I had a smaller extraction system. Even if you don't need all that flow, you can slow it down and it runs quieter, you can deal with hotter situations or the addition of extra heat sources...
 
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