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Safety -- Make sure you are safe!

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  #31  
Old 2016-05-26, 5:52pm
Double Helix Glassworks's Avatar
Double Helix Glassworks Double Helix Glassworks is offline
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Join Date: Sep 08, 2005
Location: Charlottesville, VA
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Looks like your venting through an exterior wall. That makes it easy.

I can't tell from your photo, but if the rain-cover-box thing over your blower is more or less sealed, it's not going to be able to move much air at all. A couple drilled holes isn't going to cut it. The intake volume = the exhaust volume...in other words, blocking the exhaust is the same as blocking the intake.

Open Prop fans move a lot of air, while ducting creates a lot of drag. With 24" of 8 inch ducting, you're no longer pulling 495 CFM.

I've had in-line duct fans rated at 3000CFM pushing through several feet of 12" diameter pipe that pulled less air than a 1000 CFM attic fan.

If it were me, I'd be installing a fan like this in the wall, on a rheostat, with hood built from hardi-backer and 1x2's.


0-1650 CFM, $100.

Not cute. Not very quiet.

My 2.

Edit: I am not a ventilation expert, just speaking on what has worked for me, from personal experience. I hope you find a solution that provides adequate airflow.

Stay safe!
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  #32  
Old 2016-06-30, 6:52am
RunningOnFumes RunningOnFumes is offline
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Join Date: Oct 31, 2014
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Well I now agree with you on the space. It does take up a lot. Plus I had to add sides because I was not pulling what I thought I was going to with my 1100 cfm inline but I do feel safe now while fuming.




Last edited by RunningOnFumes; 2016-06-30 at 6:58am. Reason: pics didnt show in the thread
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  #33  
Old 2016-06-30, 7:00am
RunningOnFumes RunningOnFumes is offline
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Unfortunately Double Helix, Its not my house so I can't make changes like that but once I get my own home. I will definitely have a more permanent / efficient setup!!

Last edited by RunningOnFumes; 2016-06-30 at 7:03am.
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