Winix U450

True HEPA air purifiers like the Winix U450 Signature help protect allergy and asthma sufferers from irritants and allergens. Even regular homeowners would benefit from such a device since it rids your home environment of foul odors, dust, and smoke.

If you’re looking for one a top-performing air purifier, the U450 might be your perfect match. Find out why in our review below.


  • Good coverage area
  • 5-stage filtration removes all sorts of indoor air pollutants
  • Included remote control
  • Auto mode and particle sensors
  • With a filter change indicator
  • Four speed settings
  • Auto-dim lights and sleep mode


  • Pricey
  • Not the most energy efficient model
  • No timer

Technical Specifications

Designed for use in medium to large spaces up to 450 sq. ft., the Winix U450 Signature air purifier uses a 5-stage air cleaning system to combat indoor air pollutants. It has a washable pre-filter, a True HEPA filter, a washable AOC (Advanced Odor Control) Carbon filter, PlasmaWave technology, and CleanCel antimicrobial coating that work together to get the job done—resulting to CADR ratings of 298, 343, and 291 for dust, pollen, and smoke respectively.

It also has four speed settings, a noise output range of 27 to 60 dB, and a power consumption of 10 to 110 W.

Specifications Sheet

Specs Winix U450 Signature
Dimensions 18.9” x 25.6” x 11.8”
Weight 18.7 lbs.
Area Coverage 450 Square Feet
Noise Level 27 to 60 dB
Power 10 to 110 W
CADR Rating for Smoke 291
CADR Rating for Pollen 291
CADR Rating for Dust 291
Fan Speeds 4
Filter Type True HEPA filter
Odor Reducing Filter Yes
Ionizer Yes
Control Style LCD Display
Timer Function No
Warranty 5 Years


The Winix U450 Air Purifier’s CADR ratings are undoubtedly impressive for a model that’s designed to cover 450 sq. ft.—thanks to its 5-stage filtration system that includes a True HEPA filter.

The first stage of this system, which is the washable pre-filter, removes larger pollutants from the air as they enter the air purifier—thereby helping extend the life of the True HEPA filter. Note that the True HEPA filter, aside from removing 99.97% of smaller particles from the air, had also been treated with the CleanCel antimicrobial coating, which neutralizes airborne germs.

Next, the AOC carbon filter, which is also washable, removes gaseous contaminants like odors, smoke, and VOCs. And lastly, there’s the Winix PlasmaWave technology, which aids the other filters in purifying the air.


For that set-and-forget type of convenience, the U450 boasts an Auto Mode that works with an air quality sensor to automatically adjust the machine’s fan speed according to the level of air pollution inside the room. The air quality sensor also communicates its findings through a visual indicator.

For concerns regarding nighttime use, a sleep mode is available if you’re looking to minimize the noise generated by this air purifier. The U450 also has a light sensor that automatically dims the LED lights at night—helping you maintain a dark and sleep-friendly bedroom.

Lastly, this Winix purifier comes with a filter light indicator and remote control which, of course, are always welcome conveniences.


Sporting a glossy white façade and ridden with curved edges, the Winix U450 is definitely pleasing to look at. Its modern design makes it look sleek even though it’s quite a big device at 18.9 x 25.6 x 11.8 inches. The control panel houses an LCD display and is conveniently located at the top portion of its body, which makes it easy to reach and use.

Warranty and Support

Backed by a 5-year warranty, the Winix U450 provides adequate protection to its consumers who might encounter manufacturing defects. U450 users who might require some assistance can reach out to Winix using the contact details that are provided in their website.

Final Thoughts

The Winix U450’s relatively high price tag and maximum power consumption might be a deterrent to some shoppers. But if you’re able to look beyond these cons, this air purifier is certainly one of the best-performing models we’ve seen thus far—and it has the looks to boot. With a five-stage filtration system to tackle pretty much all kinds of air contaminants, a good coverage area, and convenient modes and features, it’s not hard for us to recommend the U450 at all.

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