Kleen Air 300 review

In a home up to about 1,300 sq ft with mostly hard floors, yes. With a lot of shag carpet, a canister vacuum still cleans more thoroughly.

Expect three to five years. Ideally, choose a model whose battery you can replace yourself.

No. Above $400 we mostly saw extra accessories and a display, not necessarily better cleaning results.

No. Manufacturers cannot pay for a spot and only see our conclusions after publication.

A canister vacuum still cleans high-pile carpet more thoroughly and has no battery that wears out. A stick vacuum is quicker to grab, easier on the stairs and takes up less space. For most homes with hard floors, a good stick vacuum is enough.

Wattage says little about how well it cleans. In our test, a model with fewer air watts picked up more dirt than a stronger model because its brush worked better. Look at test results per floor type.

Yes, and that's exactly where they shine. Remove the wand and use the unit as a handheld with the small turbo brush. A model under 2.5 kilos is the most comfortable.

Yes, if it has a brush that doesn't let hair wrap around it. The Northwind X2 did this best in our test. With other models you need to cut the brush clean regularly.

Rinse a washable filter once a month and let it dry for a day. Replace it once a year. If you have pets, clean it every two weeks.

A full charge uses 0.05 to 0.1 kWh. If you charge it every day, that costs roughly $5 to $10 a year.

Yes. Modern batteries stop charging when they're full. A battery does last longer if you store it at room temperature.

Prices usually drop around Black Friday in November and in January. In our price history, the Vorta S9 dropped by up to 15 percent during those periods last year.