Laser k40 modification

Projects
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In this section I explain why this definition, I was cutting different materials and I realized all the smoke escaping everywhere there is no fan that extracts everything with so many holes so I decided to teach the work area 90% to have a air intake and a single exit and I run 100x100 and no more smoke in my garage?

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I would have thought the machine instruction had a recommended evacuation cfm.
I have heard that they do not come with exhaust system.

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if it brings an exhaust system that does not work at all and if it does not enclose the work area will throw smoke everywhere?