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 exhaustThey'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.
![shock !!! !!!](/talk/styles/default/xenforo/smileys/shock.gif)
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