How Much CFM for a 4'x4'x6.5' Tent? +rep

redi jedi

redi jedi

Well-Known Member
A 4" centrifugal(160-170cfm) would vent that space in less than a minute....more than enough but they dont come much smaller. I've never seen anyways...
 
AmazedHaze

AmazedHaze

Member
Simple rule is: You wanna be able to move all the air in your room within a 5 min period. Your room is approx. 105 cubic feet so any fan that pushes more then 105 CFM you'll be good. Redi Jedi is right,even the 4" inline fan would work for you. Hope this info helps you out.
 
redi jedi

redi jedi

Well-Known Member
plantz said:
ty so much all +reps. Will a 170 CFM fan be enough if i have a carbon scrubber too?
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It will be fine....just get a filter thats rated for the same cfm or a bit more. There is some reduction in flow but its nowhere near 70%

If you make your own filter, make it the same size as a commercially manufactured filter thats rated for the same cfm as your fan. Surface area and bed depth are important.
 
plantz

plantz

Well-Known Member
redi jedi said:
It will be fine....just get a filter thats rated for the same cfm or a bit more. There is some reduction in flow but its nowhere near 70%

If you make your own filter, make it the same size as a commercially manufactured filter thats rated for the same cfm as your fan. Surface area and bed depth are important.
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ty so much +rep!
 
madcatter

madcatter

Active Member
Also the number of bends and elbows in your setup will reduce the airflow.... I would be tempted to go the 6 inch and if you need to put a variable speed switch on it and dial in what you want... Also if you are running CO2 don;t beputting out CO2 while venting....
 
plantz

plantz

Well-Known Member
madcatter said:
Also the number of bends and elbows in your setup will reduce the airflow.... I would be tempted to go the 6 inch and if you need to put a variable speed switch on it and dial in what you want... Also if you are running CO2 don;t beputting out CO2 while venting....
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Im not completely retarded thanks though.
 
elduece

elduece

Active Member
You got a 400 watt lamp and 104 cubic foot of space in that tent. Get a six inch sunleaves Windtunnel. No calculations needed,enough time has already been spent. This windtunnel is a 100 percent plastic fan which the quietest fan there is rated for 409 cfm although mine tested at 450 but hey. No question it will handle a properly made filter too. However, you can't use a variable speed controller on it though because it has fixed frequency capacitor otherwise it'll make whining noise if you do.
 
plantz

plantz

Well-Known Member
elduece said:
You got a 400 watt lamp and 104 cubic foot of space in that tent. Get a six inch sunleaves Windtunnel. No calculations needed,enough time has already been spent. This windtunnel is a 100 percent plastic fan which the quietest fan there is rated for 409 cfm although mine tested at 450 but hey. No question it will handle a properly made filter too. However, you can't use a variable speed controller on it though because it has fixed frequency capacitor otherwise it'll make whining noise if you do.
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Do you have a link for this product?
 
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