Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?
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Notes -
The central units are generic and easy to get, cost only a little more than a nice portable unit, and the sweepers generally conform to one of only a couple standard types. The rest is just plastic tubes and wall ports. Biggest advantage is that the central unit can exhaust to outside, so heavy filtration is not needed to reduce fine particles and dust, and the power of even a low end central unit can't be matched by any kind of portable vacuum cleaner. The central unit typically has a collection bin you can remove and empty, like a shop-vac.
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