Designing a New Shop-Dust Collector in a Separate Closet?

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Forum topic by gerrym526 posted 10-25-2019 07:05 PM 986 views 0 times favorited 12 replies Add to Favorites Watch
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280 posts in 4371 days

10-25-2019 07:05 PM

Topic tags/keywords: question

Starting from scratch designing a standalone woodworking shop building about 800 square feet.

I have the option of framing in a separate closet to contain the dust collector-have any of you done this in your workshops? Closet would have a pre-hung interior door for access to the dust collector.

How is it working-does it cut the noise (I can always put sound insulation in the walls of the closet).?

Any issues with heat generated by the motor? I’m looking at the 2.2 hp Jet cyclone at this point as a possibility.

Thanks for the help.

-- Gerry

12 replies so far

View EarlS's profile


3311 posts in 2911 days

#1 posted 10-25-2019 07:17 PM

Keep in mind, all of the air has to go somewhere. If you put the DC in a closet and close the door, the only openings for the air to vent out of the space is the cracks around the door. If the total area of those cracks is less than the cross sectional are of your incoming DC line it will result in a higher pressure in the closet which puts back pressure on the fan, in turn decreasing the capacity of the DC system to move the air from your tools. Basically, you will plug the back end of the DC up causing problems on the front end.

Noise can be dealt with around the motor and fan housing using sound deadening materials. You will need to be careful not to insulate the motor causing heating issues. Most motors have some kind of integral fan cooling system.

-- Earl "I'm a pessamist - generally that increases the chance that things will turn out better than expected"

View pottz's profile


7056 posts in 1547 days

#2 posted 10-25-2019 07:20 PM

i wish i could because they are dad had a large shop when he retired in oregon,he put his collector in a small shed on the outside of the shop,so no noise and no dust in the shop ah huge improvement.if you can do it i would.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View Rick  Dennington's profile

Rick Dennington

6778 posts in 3757 days

#3 posted 10-25-2019 09:31 PM

When I built my shop I added a 10’ x 10’ room in one corner with a walk in door to gain access to my dust collector, and insulated the walls for noise reduction.. My air handler is also in that room for my central a/c unit. I’ve had no problem with anything, and that was in 2003….Still going strong, and no loss of anything. A few years back I put a Wynn air filter on my unit, and never looked back….!!

-- " There's a better way.....find it"...... Thomas Edison.

View LesB's profile


2238 posts in 4006 days

#4 posted 10-26-2019 12:19 AM

I though about doing what pottz said and putting my dust collector in an outside closet but quickly realized that most of my wood working is in the winter and I would be sucking all the warm air out of my shop so that was not an option.

I use a portable unit that I move from machine to machine and also have a air cleaner that helps remove the fine dust from the air (and also circulates the heated air from the wood stove). The blower in the air cleaner is a used home heating air handler blower installed in a rolling cabinet with a double furnace type filtration baffels.

-- Les B, Oregon

View MPython's profile


188 posts in 375 days

#5 posted 10-26-2019 12:19 AM

I installed a 5 hp ClearVue cyclone in my small basement shop 9 years ago. it was so loud, I couldn’t work in the same room with it, and my wife forbid my turning in on when she was anywhere in the house. I did some online research and built as sound baffled closet around it that solved the problem completely. The closet is insulated with standard fiberglass insulation (not the most efficient sound insulation but it works). The walls are Homosote fiberboard. I was worried about EarlS’s issue about choking off the exhaust and killing the cyclone’s efficiency. I fixed the problem by venting the exhaust around the top of the closet and building Homosote baffles into the vents to kill the sound before it found its way back into my shop. The cross sectional area of my exhaust vents are over twice the cross section of the inlet ducts, so there is no problem with back pressure. It was an interesting project and a lot of work, but it reduced the cyclone’s banshee scream to a purr. I can’t hear it over the noise of my machines and my wife can have her garden club and book club meetings in our den directly above the shop with no complaints.

P.S. I’ve had no problems with heat buildup. I think the constant flow of fresh air that circulates in the closet flushes out most of the heat generated by the motor and the relay.

View Hermit's profile


238 posts in 1888 days

#6 posted 10-26-2019 12:43 AM

My shop is 20×22 with a built in dust collector closet. 2×4 framed with batt insulation. Plywood and 1×4 exterior. Drywall inside with a 12×24 vent on the ceiling. It makes a big difference. I had the decibel levels written down somewhere but can’t find them. The closet also holds my air compressor. I use the exterior siding for clamp storage.

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

View drzaius's profile


13 posts in 1846 days

#7 posted 11-13-2019 03:33 AM

My shop is in the garage. In the basement adjacent to the garage, I built a closet for the dust collector & air compressor. There is an 8” inlet duct to the cyclone & a 32×8” serpentine return air duct to the shop. The closet walls & ceiling are: 5/8” drywall – Greenglue-5/8” drywall – 2.5” steel stud /w 3” Roxul – 2.5” steel stud /w 3” Roxul – 5/8” drywall – Greenglue – 5/8” drywall.

When standing in the basement outside the closet the DC cannot be heard. At all. I have to hold my ear next to the wall to tell it’s running. The compressor is in there & it can be heard running, but it’s a horrible thing that sounds like it’s gonna blow up any second.

This saves me some valuable space in the shop, & it doesn’t bother anyone in the house with the noise.

View clagwell's profile


57 posts in 355 days

#8 posted 11-13-2019 11:17 AM

... The closet walls & ceiling are: 5/8” drywall – Greenglue-5/8” drywall – 2.5” steel stud /w 3” Roxul – 2.5” steel stud /w 3” Roxul – 5/8” drywall – Greenglue – 5/8” drywall…

Impressive! What did you use for a door?

-- Dave, Tippecanoe County, IN

View controlfreak's profile


343 posts in 164 days

#9 posted 11-13-2019 11:47 AM

I would love to move my shop vac w/ cyclone to a compartment on the outside of my shop for both noise and to free up space. I sounds like in the winter if I exhaust the output outdoors I will pull in so much cold air I would possibly be uncomfortable. If anyone has done this setup do you return the air to your shop? Do you attempt to filter before return or just use a separate air cleaner? Currently I use a cyclone first stage then use a bag in the vac as a second stage and then a pleated filter also in the vac as a final third stage. I will probably build the compartment to a size that will handle a larger dust collector when I outgrow this setup.

View Fred Hargis's profile

Fred Hargis

5838 posts in 3056 days

#10 posted 11-13-2019 12:28 PM

... The closet walls & ceiling are: 5/8” drywall – Greenglue-5/8” drywall – 2.5” steel stud /w 3” Roxul – 2.5” steel stud /w 3” Roxul – 5/8” drywall – Greenglue – 5/8” drywall…

Impressive! What did you use for a door?

- clagwell

That is beyond impressive. I’d also keep my valuable documents in there.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Blindhog's profile


138 posts in 1611 days

#11 posted 11-13-2019 03:43 PM

I have a very similar setup to MPython using a 5hp ClearVue. The room is apx 6×6 with a fiberglass board RA boot that puts the exhaust back into the shop. Cuts down the noise dramatically and helps keeps the conditioned air in the shop. Walls are typical 2×4 and 2×6 studs with fiberglass batts for insulation.
This has worked quite well for the past 5 years.

-- Don't let perfection get in the way of plenty good enough

View drzaius's profile


13 posts in 1846 days

#12 posted 12-10-2019 04:30 AM

... The closet walls & ceiling are: 5/8” drywall – Greenglue-5/8” drywall – 2.5” steel stud /w 3” Roxul – 2.5” steel stud /w 3” Roxul – 5/8” drywall – Greenglue – 5/8” drywall…

Impressive! What did you use for a door?

- clagwell

I got 2 cheap insulated exterior prehung doors & installed them back to back. Each has 3/4” MDF screwed/greenglued to one face. Each door has as separate jamb that is isolated by a 1/2” gap, which is filled with closed cell foam. The foam insulation in the doors does little, but the isolation & mass from the MDF do the job nicely. I was going to cover the faces of the doors with acoustic tile, but there was no need.

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