Please poke holes in my Dust Collection Solution

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Forum topic by Button43 posted 05-02-2013 12:43 AM 1633 views 0 times favorited 7 replies Add to Favorites Watch
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20 posts in 1894 days

05-02-2013 12:43 AM

Hey guys, I have been doing research on Dust Collection but I wanted to get some feedback to see if it seems like a sound solution.

My plan is to buy the HF 2 hp unit and mount it in a small closet sized off shoot in my garage. On the opposite side of the wall is where we keep our trash cans outside, so I am planning on getting another trash can and building a Thein separator to sit on it. I figured with the separator outside it would make it easier, and cleaner to empty, and not take up space in the shop.

As far as filtering I was thinking of just filtering it outside in to a bucket filled with water to keep the outside fines down. I have seen similar water traps for dryer outlets like in the link below.


Do you think the lint trap solution would work? I have a lemon tree and a shed pretty near the outside of the shop, and the neighbors house 10 feet beyond that so I don’t want a ton of fines flying around outside. If the outside filtering isn’t an option. I guess I could just get a .5 micron filter.

Any feedback would be appreciated.


-- - Chris

7 replies so far

View Cole Tallerman's profile

Cole Tallerman

392 posts in 2208 days

#1 posted 05-02-2013 01:02 AM

Not sure about the water idea, but if your going to have your separator in the closet/outside, you should put your whole dust collecter with it. it will greatly decrease the noise which is very importent to me. I can sit at the bandsaw and enjoy what im doing rather then hearing the whirring of multiple machines.

View crank49's profile


4032 posts in 2994 days

#2 posted 05-02-2013 02:42 AM

There is nothing wrong with your plan as long as you can afford to loose all the conditioned air. Don’t know where you are located so air temperature is unknown.

Thein is ok, but a good drop out box is just about as good and does not reduce your pressure capacity as much.

I assume you are keeping the bag on the DC so the stock 5 micron bag is perfectly fine for outside venting.

If you have any vented gas appliances in your shop, like a water heater for instance, you must provide make-up air to replace what you vent outside, or you run the rise of back draft and carbon monoxide poisioning.

A good alternate solution is to put the collector, and Thein or dropout box in the outside room/closet/shed and have the room air tight. Then provide a screened vent outside and a filtered vent back into the shop. then provide a way to close off one or the other of these vents. In mild weather you vent outside. In cold or hot weather you vent back into the shop. In this case I’d replace the bag with a cartridge filter.

View Grandpa's profile


3259 posts in 2698 days

#3 posted 05-02-2013 02:58 AM

Crank49 has designed many dust collection systems as I understand it. I think he is giving some good advice. Pay close attention to the furnace and water heater if this is in your home. Think about the cold weather or in some cases the hot weather if you use A/C

View MT_Stringer's profile


3172 posts in 3254 days

#4 posted 05-02-2013 04:38 AM

To help prevent damage to your impeller from foreign particals your Thien separator needs to be upstream of your blower. Is that part of your plan?

-- Handcrafted by Mike Henderson - Channelview, Texas

View Dave G's profile

Dave G

332 posts in 2071 days

#5 posted 05-02-2013 08:20 AM

One small comment that addresses just your original post: where I live in northern climate the water + outside = problem.

-- Dave, New England - “We are made to persist. that's how we find out who we are.” ― Tobias Wolff

View Button43's profile


20 posts in 1894 days

#6 posted 05-02-2013 05:56 PM

I appreciate the input guys. I live in Southern California so my garage does not have heat, or AC (though it would be nice at times). The shop is also far from airtight, there are vents that are in the exterior wall. You guys bring up some good point in that it might be a good idea to build a sealed shed outside to house the whole DC system and protect it from the weather. I could probably put in some rigid insulation in to the DC closet to keep the noise down so it doesn’t’ disturb the neighbors.

Just last night Harbor Freight emailed me a 20% off coupon – it must be a sign.



-- - Chris

View crank49's profile


4032 posts in 2994 days

#7 posted 05-02-2013 06:32 PM

You can do a pretty good job of sound proofing a machine with a plywood (thicker the better) enclosure, painted inside and lined with open cell foam rubber. The open cell foam lets the sound waves penetrate into the foam then the wood outer layer reflects the waves back.
Using this simple technique of enclosing anything noisy we could, we lowered the background noise level in the foundry where I worked from 88db to about 72db. That might not sound like much, but it was enough improvement that the workers did not have to wear earplugs and they were very happy about that.

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