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Enclosing a dust collector

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Forum topic by Hermit posted 12-21-2016 07:35 PM 553 views 0 times favorited 4 replies Add to Favorites Watch
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Hermit

139 posts in 1163 days


12-21-2016 07:35 PM

I’m in three process of building my shop and have always planned on enclosing the DC. My DC below was rated at 70-80 decibels. Checked it with an app on my tablet and it was 76. My shop is well insulated and on a slab so I get some echo which I assume makes it sound a little louder than it really is. Hopefully when I get everything in there a lot of the echo will dissappear. My question is for those that have enclosed their dc’s…did you notice a difference and if so was it that Noticeable? Really hoping to get it down below 70 db’s even with a return air grill on the lid.

-- I'm like the farmer's duck. If it don't rain, I'll walk.


4 replies so far

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htl

3158 posts in 997 days


#1 posted 12-21-2016 07:45 PM

I boxed mine up helped get rid of the high pitched wine.

-- There's a hundred ways to do anything, alot depends on the tools at hand.

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JBrow

1274 posts in 757 days


#2 posted 12-23-2016 01:07 AM

Hermit,

I enclosed my dust collector within a wooden frame skinned with plywood. The enclosure sets on castors. My goal was to reduce the noise level from maybe 105 db to a level where other woodworking machinery would be louder than the dust collector. In order to achieve this sound reduction the enclosure was packed with denim 3-1/2” bat insulation. Some UltraSonic 1 sf acoustical panels were placed atop and around the impeller. I also applied some acoustical panels to the wall and ceiling where the dust collector sets. I never measured sound levels with any instrument; relying instead on my subjective perceptions. The dust collector is a 5 hp cyclone unit with a 16” impeller. These sound abating measures definitely made a difference, but then my dust collector was quite a bit louder than yours at 76 db.

With your dust collector, an enclosure could make maintaining the dust collector cumbersome (emptying the chip bag and cleaning the filter). There seems to be a consensus that most noise emanates from the impeller and its exhaust. Therefore, these areas could be targeted. The impeller could possibly be enclosed in a box packed with mineral wool or denim insulation while providing motor ventilation. Manufacturer data suggest that these types of insulation absorb sound a little better than fiberglass.

The flex hose from the impeller to the dust bag/filter assembly could be wrapped in the same insulation which could then be wrapped in 3 mil poly (contractor trash bags). The alternative would be to buy or build a muffler. I believe a shop made muffler is discussed on Bill Pentz’s web site.

The last measure that may be worth considering is to apply acoustical panels to the wall and ceiling near the dust collector and perhaps even elsewhere in the shop. The idea is that these panels would capture some sound emitted by the collector thus keep that sound from sound bouncing off walls.

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Hermit

139 posts in 1163 days


#3 posted 01-08-2017 02:28 PM

Well to update, I was able to get the db down to 68 and still don’t have the doorknobs on yet. I went with R-13 fiberglass bats, 1/2” drywall, 1/2” plywood, hollow core doors, and a cheap piece of carpet on the floor. Happy with it so far and I may fiddle with it even more down the road.

-- I'm like the farmer's duck. If it don't rain, I'll walk.

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htl

3158 posts in 997 days


#4 posted 01-08-2017 03:36 PM

Love the compressor in there too, them things are loud!!!
Make sure it gets enough air in there they can get warm in the enclosure.
I think I see a grill in the lower back.
Just my $.02.

-- There's a hundred ways to do anything, alot depends on the tools at hand.

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