That's a possibility, but we troubleshoot the unit and the service person said it must be a defective vacuum. I used a regular shop vac with a paper filter with a little water on the bottom of the pan and got NO DUST at all out of the exhaust Quite odd....They're pretty simple devices, wonder if you have the wrong filter in there ? Pretty much if you have the right filter and it fits tight, no gaps, no cracks or holes and seals then it shouldn't spew dust/ash.
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