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Looking for opinions.

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« Reply #15 on: February 18, 2015, 04:27:40 pm »

Hope you are planning on having the exhaust go outside.  If not you do want to be using a hepa filter.
Remember the smaller the particles the worst they are for you, and the longer they stay in the air.  And if you do exhaust outside  not sure you need much of a filter as you are grinding rock not grinding precious metal.
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