Help - where do you locate your dust filter? - Router Forums
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post #1 of 43 (permalink) Old 03-04-2012, 05:32 AM Thread Starter
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Default Help - where do you locate your dust filter?

I'm not talking about dust collection here. I'm specifically referring to air filtration like the ones sold by BusyBee, King, General, Powermatic, Grizzly and any number of other vendors.

Here's the rub. I'm updating the sticky on dust collection. I've divided the function into two parts, dust collection and air filtering.

On the air filter side I'm trying to determine the best location of an air filter. Firstly, is ceiling mount better than suspended or table mounted? Should the filter be located in the middle of the room or on the side? Where have you located yours?

A further question, do you know of any information from any other industry that deals with air filtering and the location of filters or fans etc.

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post #2 of 43 (permalink) Old 03-04-2012, 07:28 AM
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I deal with air cleaners on an everyday basis in HVAC.
From an air circulation standpoint the best location of the filter is in the center of the room, From an air cleaning standpoint the best location is near the source. The reason you will see so many mounted hanging from ceilings ect, is to make them accessible and keep them out of the way. Physical location will normally be decided based on whats practical for a given shop.
Types and methods of filtering are going to differ considerably based on where your wood working shop is located.
In a stand alone shop I would use a dust collector as the air filter. If you feel you need to reduce the dust levels apart from when you are actually making the dust with a tool, simply turn on your collector and open your ports, it will probably move more air and do a better job of filtering than a stand alone filter.
If your shop is in your home the needs are probably quite a bit different. Room constraints can keep you from installing a central dust collection system. I would do a combination of things in that situation. First, still always try to collect the dust at its source, even if only using a shop vac. 2nd, stand alone dust collector with a mirv rating of at least 11. 3rd High efficiency air cleaner on the central heating or cooling system in the home.
Hope this helps.
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post #3 of 43 (permalink) Old 03-04-2012, 10:42 AM Thread Starter
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Hi Mark:

Quote:
Originally Posted by Tin man View Post
I deal with air cleaners on an everyday basis in HVAC.
From an air circulation standpoint the best location of the filter is in the center of the room, From an air cleaning standpoint the best location is near the source. The reason you will see so many mounted hanging from ceilings ect, is to make them accessible and keep them out of the way. Physical location will normally be decided based on whats practical for a given shop.
Thanks for the location information. Is there more detailed information somewhere?

How much clearance should I have on the intake side? I'm using a box fan with stacked filters. If I could mount it close to the ceiling and pushing air downward, I could create an efficient circular motion, down in the middle and up on the sides. Does this seem reasonable?

Quote:
Originally Posted by Tin man View Post
Types and methods of filtering are going to differ considerably based on where your wood working shop is located.
Mine is a dedicated shop, 16'x20' with 8' ceiling. It is insulated with 4" of Fiberglas vapour barrier and R40 in the attic. I have no icicles.

Quote:
Originally Posted by Tin man View Post
In a stand alone shop I would use a dust collector as the air filter. If you feel you need to reduce the dust levels apart from when you are actually making the dust with a tool, simply turn on your collector and open your ports, it will probably move more air and do a better job of filtering than a stand alone filter.
I've broken the dust issue into two parts: dust collection and air filtering. I'm working dust collection to MERV 8 and air filtering to MERV 8 and 1900MPS. I was using a 1 micron non-rated filter before and was having respiratory problems. I'm not going for minimalist now. If this doesn't work, I'll have to wear a fine particle gas mask.

Ok, what is optimal air movement? A shop vac moves from 135CFM to 185CFM. BusyBee's 5HP 220V dust collector moves 4820 CFM. My box fan moves 2100 CFM. BusyBee makes a big deal out of the noise being 90dB but nothing more than "1-Micron top bags" for filtering. No rating.

My shop is 16x20x8=2560 cubic feet. My fan will move all of that air in slightly over 1 minute given good air circulation. Theoretically, I can filter all of that air through my 1900 MPS filter in 1 minute 12 seconds.

Quote:
Originally Posted by Tin man View Post
If your shop is in your home the needs are probably quite a bit different. Room constraints can keep you from installing a central dust collection system. I would do a combination of things in that situation. First, still always try to collect the dust at its source, even if only using a shop vac. 2nd, stand alone dust collector with a mirv rating of at least 11. 3rd High efficiency air cleaner on the central heating or cooling system in the home.
Hope this helps.
Ok, can we put together a series of scenarios:

1. stand alone workshop: dust collection and air filter. Location of the air filter should be in the middle of the room or closest to the source of the dust.

2. in-home workshop: try to collect dust at the source and put in a high efficiency air cleaner. What rating should the air cleaner have?

Is there any other scenario that should be addressed?

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post #4 of 43 (permalink) Old 03-09-2012, 04:08 AM
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Hello!
I use an air filtration at ceiling level, it's home made and does not work well enought.

The idea is to pump air at ceiling level trought a filter, Could not get better than some
car air-intake filters at this time. They are in a box, this could be changed now that there is easyly availlable car-clim filters sub micron type.

Then a flex alu pipe to a squirrell rotor extractor thats a bit weak.

Then the filtered air is thrown in a pipe for difusion above my bench.

The diffusion box is 1.1 m x 0.5 m It did work well , before i put some big light in it.

It's based on what they install in surgy blocs above surgy table
to keep the air clean and bacteria free .

Got to change light position to outside the box and change filter type.
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post #5 of 43 (permalink) Old 03-09-2012, 05:07 AM Thread Starter
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Quote:
Originally Posted by ggom20 View Post
Hello!
I use an air filtration at ceiling level, it's home made and does not work well enought.

The idea is to pump air at ceiling level trought a filter, Could not get better than some
car air-intake filters at this time. They are in a box, this could be changed now that there is easyly availlable car-clim filters sub micron type.

Then a flex alu pipe to a squirrell rotor extractor thats a bit weak.

Then the filtered air is thrown in a pipe for difusion above my bench.

The diffusion box is 1.1 m x 0.5 m It did work well , before i put some big light in it.

It's based on what they install in surgy blocs above surgy table
to keep the air clean and bacteria free .

Got to change light position to outside the box and change filter type.
Merci Gerard,

Est-ce que je peut vous suggère les filtres de fournaise. C'est beaucoup moins cher et beaucoup plus efficace. Je suis en train de modifié l'article que j'ai écrit pour ramasse poussière. Ce sera pas longe et vous pouvez voir mon solution.

Hi Gerard:

Can I suggest furnace filters. It is much less expensive and more efficient. I'm in the process of modifying the article that I'm writing for dust collection. It won't be long and you can see my solution.

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post #6 of 43 (permalink) Old 03-09-2012, 05:46 AM
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Bonjour!
Hello!

J' attends votre article avec interêt.
Je n' aurais jamais imaginé que des filtres pour cuisine soient meilleurs que ceux pour les moteurs...

I wait for you make your updating about filtering.
I could not imagine furnace filter would be better then motor-intake ones

Amicalement.
Regards
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post #7 of 43 (permalink) Old 03-20-2012, 03:01 AM
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Part of my shop is in the garage and the rest of my tools (band saw, table saw, and router) are located in my basement. This offered a unique problem. My solution was to locate my collector in my garage and run pipe to my basement.
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post #8 of 43 (permalink) Old 03-20-2012, 05:12 AM Thread Starter
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Quote:
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Part of my shop is in the garage and the rest of my tools (band saw, table saw, and router) are located in my basement. This offered a unique problem. My solution was to locate my collector in my garage and run pipe to my basement.
Hi Declan:

Ok, that's the dust collection from the sawdust generated by a tool. But that machine then throws dust into the air and that's the stuff that will kill you. That's the second part of dust collection, the filtering of the air. I've dedicated a good chunk of work trying to figure out something that works, and well. Here's the link:

http://www.routerforums.com/woodwork...important.html

Ron

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post #9 of 43 (permalink) Old 03-20-2012, 06:00 PM
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Call me crazy but an air purifier is just that. Instead of spending big bucks for an industrial filter I use a round Honeywell HEPA filter. I bought this for $20? at a flea market. When sanding I set it next to the project and it pulls all the fines and most of the larger stuff into the filter. Of course you are welcome to spend more money for less performance...

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post #10 of 43 (permalink) Old 03-21-2012, 04:48 PM
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Quote:
Originally Posted by Mike View Post
Instead of spending big bucks for an industrial filter I use a round Honeywell HEPA filter. I bought this for $20? at a flea market. more money for less performance...
Hello mike!

i' d like to know more about your 20$ Honeywell HEPA filter like ref number ?
So ii could get info about real market price .

Tia
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