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<blockquote data-quote="henry200" data-source="post: 183544" data-attributes="member: 5772">That&#039;s an interesting comparison.  I would have thought that the cyclonic action in the Tristar bag wouldn&#039;t have been effective on really fine dust.  Usually you see demonstrations of the effect with sand or something more coarse which wouldn&#039;t coat a surface the way plaster dust will. When I purchased my previous house I sanded all the wood floors before moving in.  The dust was everywhere, coating the walls, ceiling, windows; what a mess!  I used a Honeywell air purifier to clear the air and a Kirby Classic III fitted with a Heritage emptor/bag assembly.  The Kirby performed very well, with only moderate loss of suction towards the end.   A good amount of dust escaped the paper bag (the only ones available back then) but the heavy cloth outer bag trapped it well-enough.  Shortly after the floor sanding episode I invested in a shop vac fitted with a HEPA filter and high-efficiency bags which I&#039;ve used for all post-remodel cleanups since then.  My household vacuums all breathed a sigh of relief. I used a Filter Queen as my daily driver for several years and every time I emptied it the filter cone was thickly caked with super fine, chalky dust.  I wondered at the time if heavier soil like sand, spinning rapidly in the pan rock-tumbler fashion wasn&#039;t getting pulverized, creating some of the chalky type dust on the filter.  </blockquote>

[QUOTE="henry200, post: 183544, member: 5772"] That's an interesting comparison. I would have thought that the cyclonic action in the Tristar bag wouldn't have been effective on really fine dust. Usually you see demonstrations of the effect with sand or something more coarse which wouldn't coat a surface the way plaster dust will. When I purchased my previous house I sanded all the wood floors before moving in. The dust was everywhere, coating the walls, ceiling, windows; what a mess! I used a Honeywell air purifier to clear the air and a Kirby Classic III fitted with a Heritage emptor/bag assembly. The Kirby performed very well, with only moderate loss of suction towards the end. A good amount of dust escaped the paper bag (the only ones available back then) but the heavy cloth outer bag trapped it well-enough. Shortly after the floor sanding episode I invested in a shop vac fitted with a HEPA filter and high-efficiency bags which I've used for all post-remodel cleanups since then. My household vacuums all breathed a sigh of relief. I used a Filter Queen as my daily driver for several years and every time I emptied it the filter cone was thickly caked with super fine, chalky dust. I wondered at the time if heavier soil like sand, spinning rapidly in the pan rock-tumbler fashion wasn't getting pulverized, creating some of the chalky type dust on the filter. [/QUOTE]

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