On 2 Dec 2016, at 9:09 AM, Brian Lamb blamb11@... [felder-woodworking] <felder-woodworking@...> wrote:

I guess I should have continued my train of thought…. I didn’t see anything enlightening on the Festool group. I think an engineer for these dust collector companies would have to provide more info. What micron level the filters clean to is totally separate from how many milligrams per cubic meter is emitted from the DC.?

Obviously the less volume is emitted the better, but i think the size of particles has some bearing on health issues too.

Brian Lamb

blamb11@...

On Dec 1, 2016, at 9:06 AM, John Kee?jmkserv@...?[felder-woodworking] <felder-woodworking@...> wrote:

Brian we were obviously trying to find a correlation between the apples and oranges. I think if you read the Festool link you will see the connection or am I completely missing something.

On Thu, Dec 1, 2016 at 10:52 AM, Brian Lamb?blamb11@...?[felder-woodworking]?<felder-woodworking@...>?wrote:

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You guys are talking apples to oranges…. the mg/m3 is “Volume”, it’s .05 milligrams per cubic meter. The other is dust particle size, microns. So it depends upon how well the unit separates the dust particle size in the airstream, and then the pass through of the filters will determine the amount in milligrams per cubic meter of air.

Brian Lamb

blamb11@...

On Dec 1, 2016, at 8:24 AM, James Zhu?james.zhu2@...?[felder-woodworking] <felder-woodworking@yahoogroups.com> wrote:

I have no doubt that Felder RL is rated at HEPA level filtration.

Festool dust extractor has 0.3 micron HEPA filter,?.

So 0.05 mg/m? on Gyro Air is at least?HEPA level filtration, otherwise, they will not be able to sell it in Europe.

James

On Thu, Dec 1, 2016 at 10:14 AM, John Kee?jmkserv@...?[felder-woodworking]?<felder-woodworking@...>?wrote:

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I remembered there was discussion about this and found this thread on Festool Forum. The long and the short from what I read is that Felders H3 .1mg/m3 translates to HEPA filtration. See post #5 for those interested. Felder rates there filter as Class M which also says Hepa level filtration.

On Thu, Dec 1, 2016 at 9:11 AM, James Zhu?james.zhu2@...?[felder-woodworking]?<felder-woodworking@...>?wrote:

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John,

I was trying to figure out what exact micron is equivalent to 0.05 mg/m? filter emission rating on the Gryo air dust collector spec?.

II checked Felder's RL160 spec, and its filter emission rating is 0.1?mg/m?,?

This means the air coming out of Gryo air dust collector is even cleaner than Felder RL's.

James

On Tue, Nov 29, 2016 at 12:35 PM, John?jmkserv@...?[felder-woodworking]?<felder-woodworking@...>?wrote:

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I agree James, but in today's world when your trying to sell equipment with a high price tag don't you think that you would him at least checked what the rocket scientists in marketing department were putting out there on the web. LOL. ?

John

JMK Services?

-------- Original message --------
From: "James Zhu?james.zhu2@...?[felder-woodworking]" <felder-woodworking@yahoogroups.com>?
Date: 2016-11-29 12:16 PM (GMT-05:00)?
To: "phil_moger@...?[felder-woodworking]" <felder-woodworking@yahoogroups.com>?
Subject: Re: [felder-woodworking] Re: See the new dust collector??

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I think it is a typo.?

If it was 5 micron, I do not think the owner of bridge city would buy it because he is allergic to wood dust as mentioned in the following review of his new dust collector.

James

On Tue, Nov 29, 2016 at 10:21 AM,?andy.giddings@...?[felder-woodworking]?<felder-woodworking@...>?wrote:

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As the filter appears to be 5 micron, seems more like a large dust distributor than a collector :-) Hope that's a misprint

--?

John Kee

JMK Services

--?

John Kee

JMK Services