Dust Collection With no Filters

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Blog entry by woody57 posted 01-13-2012 04:29 PM 8181 reads 1 time favorited 6 comments Add to Favorites Watch

I’ve had this system for a long time and I was never happy with that filter bag. It is messy to empty the container and the filter bag doesn’t stop the fine dust from getting in the shop. I was thinking of buying one of those expensive filters or moving the unit outside of the shop. One day it just hit me, I live in the country and the only thing next to my shop is a patch of woods which I own. I don’t even need a filter. Below is what I came up with.

I took my unit apart. The motor and blower is inside and the dust container is outside. I get the larger stuff in the barrel and the fine stuff just blows out the top of the barrel into the woods behind my shop.

-- Emmett, from Georgia

6 comments so far

View KYJeepGuy's profile


54 posts in 3329 days

#1 posted 01-13-2012 05:22 PM

I did this for awhile in an old shop, worked great until I adding the heating and air conditioning. Then I had to go back to a recirculating system.

-- If I'm not in the shop, I'm someplace else. Joel, Lumberjock #30,000

View PurpLev's profile


8598 posts in 4537 days

#2 posted 01-13-2012 05:42 PM

impressive, but this looks like a lot of duct pipe (lengthwise) for this size of a motor/impeller to handle. are you getting decent DC on your machines?

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View woody57's profile


650 posts in 4315 days

#3 posted 01-13-2012 06:14 PM


No, I’m not getting the suction I need on some machines even using gate valves to shut off machines not in use. I am going to have to reconfigure my set up to cut down on the length of pipe. Also, I thought about mounting the motor up on the wall to reduce the amount of pipe.

-- Emmett, from Georgia

View Peter Oxley's profile

Peter Oxley

1426 posts in 4763 days

#4 posted 01-13-2012 06:19 PM

The sharp turns aren’t helping your suction, either. If you’re reconfiguring anyway, consider longer sweeps.

One problem with venting outside (other than losing heated or cooled air) is if you’re using gas heat, you can suck the furnace exhaust into your shop and create a CO2 problem.

-- -- --

View Paul Stoops's profile

Paul Stoops

357 posts in 3449 days

#5 posted 01-14-2012 04:54 AM

Also, you need to minimize the amount of flex duct you are using. The airflow resistance of flex hose is on the order of 3 times that of smooth walled ducting! Replacing your sharp 90º ells with two 45’s and a straight piece between them would help your airflow as well.

-- Paul, Auburn, WA

View woody57's profile


650 posts in 4315 days

#6 posted 01-14-2012 04:27 PM

Thanks for all the good ideas. I’ll use them in the improved set up later.
Venting outside is not a problem with CO2 since I use an electric heat pump.

-- Emmett, from Georgia

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