Unlike Dyson cordless vacuums, we like that the Shark IZ251UKT has a simple on/off toggle rather than a trigger system.
In other words, air watts are a much more useful measure than motor wattage when buying a vacuum cleaner..While a higher wattage can boost air watts, the amount of increase depends on the motor’s efficiency, whether the vacuum is fully sealed, and which filter is being used.. That means a higher wattage.
doesn’t mean that a vacuum provides better suction power.This is why the EU brought in new rules that limit a vacuum cleaner’s motor power to 900W.Until this change, vacuum cleaners were being built with more and more powerful motors (2500W+ in some cases), yet were inefficient and loud..
Note: The efficiency of a vacuum is usually defined as the ratio of air watts to input watts.This metric is rarely provided by vacuum cleaner manufacturers though.. Are Air Watts a Useful Metric?.
Air watts can be an interesting number to look at when.
choosing vacuum cleaners.Comparison With Other Vacuums.
Halo Capsule Vs Dyson V8.These cordless vacuum cleaners both offer great cleaning performance for a similar price, but with one obvious difference: the Halo is bagged, while the Dyson V8 is bagless.
So, how do they compare?.The bagged element of the Capsule is a rarity in the cordless world, and we love the extra dust capacity and ease of emptying.