Machines · what the machine is
A motor and a brushroll
Almost every measurable claim in this category is about the container. That is worth saying plainly, because a dust cup figure printed on a box in the same typeface as everything else reads like a claim about the floor, and it is not one.
What the listings describe
A container, measured in quarts or in liters or described with an adjective. A filter, named by type in two listings and called washable in two others. A brushroll, sometimes described as self-cleaning. Tools, named individually rather than counted. In one listing, a weight in pounds. In one listing, a cord length in feet.
One listing filed in this category describes a corded stick vacuum with a handheld conversion rather than an upright. It is kept in its own subgroup and named as what its own text calls it.
What the numbers do not describe
None of these figures is a statement about suction, about pickup or about a floor, and this site makes no such statement either. Where a listing uses a brand phrase in place of a figure, the phrase is reported as a phrase.
Where a listing names a filter type, that type has a published definition, and this site links to the body that publishes it on the relevant fine print page. A filtration specification is a statement about particles passing through a medium, and this site does not stretch it past that.
What this site does not say
Nothing about emptying, washing, servicing, assembling or connecting any of these machines appears here. Those instructions come with the machine.
What does not change when the count changes
The parts themselves. A detachable pod, a swivel neck or a longer tool list rearranges the housing without changing what the machine consists of, and none of those changes is a number.