Reply by lew

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Posted on How large or how many filters - air filtration

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12052 posts in 3750 days

#1 posted 07-13-2011 02:55 AM

I have almost exactly what you are suggesting- except it is permanently exhausted to the outside. It is a furnace blower (squirrel cage blower) mounted in a box that has an opening on both ends. I made some “tracks” to hold furnace filters over the holes. These traps the dust before it gets to the motor. Also put a 1/4” wire mesh screen over the holes to prevent the suction from pulling the filters into the blower. A word of caution- from personal experience- this set up is powerful enough to pull furnace exhaust fumes DOWN the chimney and into the basement.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

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