Air Quality

The PureGuardian H5225 is a durable, easy-to-operate humidifier. It can minimize cold and allergy symptoms, soothe dry and itchy skin, and help you keep the humidity levels in a room at healthy humidity levels with warm or cool mist.

The Winix U450 is a large-room air purifier that has a HEPA filter and an energy-efficient design. This air cleaner comes with several convenient features, including an auto mode and a remote control.

The Vornado AC550 is a small-room air purifier that uses charcoal pre-filters, HEPA filters and a fan to purify indoor air, and it does not produce any ozone or charged ions in the process.

Editor's Note: This review has been removed from our side-by-side comparison because it no longer ranks as a top 10 product. The original review is below, but check out our current top 10 about Air Purifiers here.