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Presumably the reason they use mg/m3 is because that's the standard medical exposure metric. For example, OSHA doesn't specify filter size, it specifies the maximum quantity (in mg) of dust that can

I don't see how the micron level of the filter and the mg/m3 are not directly related (not necessarily a linear relationship). Of course they are not the same thing, but changing the micron level of

The only filter that gets 100% is totally plugged. A filter is also at its highest efficiency just before its plugged, Hepa or not. We're splitting a hell of a lot of hairs between 0.1, 0.05, 0.03.

Brian, you’ve hit the nail on the head (as usual). Whether a filter can filter down to a certain size or not is only one half of the story. It’s the percentage efficiency that provides the other

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

Yes, I emailed their director (Ben Chan) for international marketing regarding the filtration. I told him that all the cheap or junk dust collectors sold in North America come with 5 micron filter. A

5 micron filter. That's a little sloppy

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.

Are Euro and US HEPA standards the same? There is always a lot of talk about filtration standards but a good quality collector with quality filters will return air that won't kill you. As important,

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

I have no doubt that Felder RL is rated at HEPA level filtration. Festool dust extractor has 0.3 micron HEPA filter, https://www. festoolusa.com/power-tool-accessories/hepa-dust-extractors/filters. So

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

James that sticker is on the side of my RL160, I also haven't found a direct cross from these numbers to actual filtration. Might to contact a filter manufacturer to see what they say.? JohnJMK

Regarding heat. Where are you located? I'm here in Minnesota. I had a pole barn shop quite a few years back. Those buildings are very difficult to insulate properly and as a result hard to heat. I set

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

I would look at the Felder rebadged EMC widebelts if still available. If not, EMC is sold elsewhere here in US. SCM sells lots of WB too. 3S is a nice machine. The Felder ACM rebadged bandsaws or the

Glen, I think heating is definitely needed in the workshop in the cold climate, not only for the comfort, but also for rust prevention, you do not want to see rust on the cast iron table on your

Well . I have a Martin T-60C sliding table saw that I am getting acquainted with .. Its by far the nicest built machine in my shop. The Felder Edge Sander I bought used for about half, its a great

Hi Rick I would love to consider used equipment, and I should but here is my issues I am not sure what i am looking at it may be clean but am I inheriting some one else problem, has the machine been

Glen, first question I think anyone that's going to buy high end equipment should ask ?a sales person is what is their background in woodworking. That in itself will tell you a lot. Next is to know