Winix AM90 Room Air Purifier Review In 2022: Replacing The King!

A Smarter air purifier that everyone could afford. Winix AM90 Wi-Fi air cleaner is the hottest model in town and is deservingly so. At a fraction of the cost of other premium models, this "Smart" machine comes with everything you need from a robust 4-stage air cleaning setup, dual sensors, autonomous mode, to advanced WiFi controls. With so much offering put to the table, is this the best Winix model in its long list of the lineup? What are the pros and cons that one should expect in its segment? More importantly, how effective are the air cleaning and particulate filtration? Find out in our full Winix AM90 review below.
online price (US)**
±219.99 $$$/ 7

(annual filter cost ±80-100)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

Winix AM90 Specification

ProductWinix AM90
15.1 x 23.5 x 8.7 in
(38.4 x 59.7 x 22.1 cm)
Weight16.5 lb (7.5 kg)
Coverage (up to)360 sq. ft. (33 m2)
Airflow speed
Dust free (CADR)233 cfm (396 m3/h)
Pollen free (CADR)240 cfm (408 m3/h)
Smoke free (CADR)230 cfm (391 m3/h)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
Washable Fine Mesh Pre-Filter
HEPA filter
- Lifespan
- Replacement cost ($)
True HEPA filter
1 year
Carbon filter
- Lifespan
- Replacement cost ($)
Activated Carbon Filter
3 months
Ionizer/ TechnologiesPlasmaWave Technology
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
Filter A 115115
1 year
+- 79.99
Optional/ Addon
Noise level27 dB
Power usage level
Timer/ SchedulerNo
SensorsDual Smart Sensors
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty2 years
Email/ Phone support

Key Features

  • 4-stage filtration with PlasmaWave Air Cleaning Technology
  • WiFi support
  • Washable Fine Mesh Pre-Filter
  • True-HEPA filter - 99.999%/ 0.003 microns
  • Activated Carbon Filter
  • 5 fan speeds
  • Auto mode/ Automatic Sleep mode
  • Air quality indicator - Blue (good), Amber (fair), Red (poor)
  • Dual Smart Sensors
  • 2 years warranty

Design And Usability

Winix AM90  dimension
15.1 x 23.5 x 8.7 in
(38.4 x 59.7 x 22.1 cm)
Winix AM90  weight
16.5 lb (7.5 kg)

Stay smart, stay safe with Winix AM90. A beautiful, modern, and clean air purifier that does not sacrifice design over functionality. At a size of 15.1 inches width, 23.5 inches height, and 8.7 inches depth, there are plenty of spaces for a large air inlet at the front and a top air outlet for air distribution. The front panel can easily be removed for filter change and will snug back tightly without any wobbling. Practicality is great where you can place it anywhere in your home even with limited space. The 16.5 pounds weight is not the lightest in its class, you can still effortlessly grab the back handle for room to room purifying when there is a need to do so.

Operational wise, Winix AM90 WiFi air purifier is easy to use and very well-equipped from top to bottom. You have a variable of 5 fan speeds with Auto mode. Auto mode will only set the air purifier at a higher speed when there is a large concentration of airborne pollutants detected. Otherwise, the fan speed will remain low. With the dual Smart mode, Sleep mode with kicks in automatically when there the room is pitch black. It will set the fan speed to the lowest (below low) and disable PlasmaWave for completely silent operation. You also have the option to disable the PlasmaWave technology if you deem it unnecessarily. There is a top air quality indicator that will change from Blue when air quality is good, Amber when air quality is fair, and Red when air quality is poor. Finally, the filter change indicator will illuminate red to remind you to replace the filter.

WiFi enabled feature is exclusive in Winix AM90 air purifier. It allows you to control the smart device anytime and anywhere in the world. While you successfully paired with your smartphone, download Winix Smart App via Google Play or App Store to gain access to the complete features. Get instant weather plus air quality updates from any part of the world, real-time filter usage life, AQI history log, timer, and of course remotely change the setting of Winix AM90 air purifier. Once you get the hang of it, the app is clean and responsive on both android and iPhone.

On the whole, Winix AM90 is a reliable and dependable model that will stand against the test of time. It is AHAM Verifide on its air filtration performance, Energy Star trusted on its energy efficiency, and UL nationally recognized Standards for Safety. It is also backed by Winix’s 2 years warranty that covers any manufacturer defects and poor workmanship.

Airflow, Coverage, And CADR

Winix AM90  coverage
Purifying coverage
360 sq. ft. (33 m2)
Winix AM90  fanspeed

Breathe better and experience fresh air with a continuous 1 hour of operation. Despite its understated price, Winix AM90 room air purifier can cover an impressive AHAM Verifide 360 square footage of air cleaning. You can further increase the room coverage to 1,740 sq. ft. with 2 air changes per hour or every 30 minutes. For an asthmatic or hypersensitive person, increase to 4 air changes per hour or every 30 minutes for a combined 435 sq. ft. coverage. No surprise Winix AM90 is ideal for medium to large room sizes including bedroom, small living room, kitchen, garage, basement, offices, small apartment, studio, and nursery home.

BrandPurifying CoverageFan Speed
Winix C545360 sq. ft.5
Coway Airmega 300S1,256 sq. ft.3
Rabbit Air A3 SPA-1000N1,070 sq. ft.5
Blue Pure Fan200 sq. ft.3
Blueair Classic 405430 sq. ft.3
Blueair Classic 205280 sq. ft.3
Winix AM90  dust CADR
233 cfm (396 m3/h)
Winix AM90  pollen CADR
Pollen CADR
240 cfm (408 m3/h)
Winix AM90  smoke CADR
Smoke CADR
230 cfm (391 m3/h)
Clean air delivery rate (CADR) outputs 233 cfm for dust, 240 cfm for pollen, and 230 cfm for smoke. The airflow delivery rate is consistent across all speeds with no signs of hiccups. Effective for home use and a good reference point but keep in mind that the test is not as comprehensive in real-life use.

Filters And Performance

Winix AM90 room air purifier uses a familiar 4-stage advanced PlasmaWave Technology to filter the air. Starting with the first line of defense, you have a fine mesh pre-filter that traps large particles in the air mainly dust, hair, fiber, and lint. The pre-filter is washable so you can clean it whenever it is clogged with dust. Next, the activated carbon filter will absorb smoke and odors coming from cooking, pets, diaper, food, cigarette, cleaning products. It can also remove harmful chemicals such as VOCs, radon, asbestos, formaldehyde while prolonging the HEPA filter lifespan. For non-smoke particles, the True HEPA filter capture 99.999% of allergens in the air as small as 0.003 microns including mold, pollen, pet dander, and germs. Finally, PlasmaWave Technology discharges Hydroxyls to neutralize bacteria and viruses including influenza strain H3N2. The dual polarity ions (positive/ negative) naturally and safely remove hydrogen from the molecular structure of air pollutants without creating ozone byproducts.

Noise And Energy Usage

Winix AM90 air purifier will run silently if you choose to. In sleep mode, the noise level is at a whispering 27 dB (lower than low speed) that you can sleep right next to it without any noise distraction. As an Energy Star certified unit, power consumption is very good that you can run it 24x7 without adding much burden to your utility bill. Running in a standard 12 hours operation, the electric cost is estimated at about $0.05 per day, $1.6 a month, or 19 dollars a year. For whole-day use, expect a low annual electric cost of under 40 dollars with auto/ sleep mode enabled.
Noise TypeDecibels
Winix AM9027 dB
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

Winix AM90  MRSP/ RSP
+- 219.99
Winix AM90  annual filter replacement cost
Annual Filter Cost
+- 80 - 100
^ Replacement filters/ estimated cost
For just under 200 dollars after discount, Winix AM90 room air purifier is perhaps the best value model since the dawn of 5500-2. For its price, you're getting the complete package identical to a premium air cleaner. The WiFi-enabled feature is the biggest stand out in its long list of features. You will not find this bundled of features in other competitors' models. Maintenance-wise, expect an annual fee of 80 dollars for the bundled filter pack. Reasonable but the quarterly carbon filter replacement can be a chore for some.
The best place to buy Winix AM90 WiFi air purifier is on Amazon as it comes with a much lower MRSP price, bundled deals, free shipping, 30 days return policy, and seasonal discount. Winix's official website is doable as well offering the same perks but pricing is slightly less competitive. You do get direct support from Winix customer service but that is hardly needed as the air purifier rarely breaks down. Local retailers like Walmart, Costco, Target may or may not carry brand so is good to give them a buzz before you head over to the store.


  • Very well priced for a HEPA air purifier blessed with many features.
  • Reasonable filter replacement cost (under 80 excluding the Winix Ultimate Pet Filter U addon).
  • WiFi remote access support with advanced tracking and voice command.
  • 4-stage PlasmaWave filtration supported by strong CADR and AHAM Verifide purifying coverage.
  • Remove 99.999% ultrafine particles with its dedicated True HEPA filter and activated carbon filter.
  • Sensitive autonomous mode thanks to the dual smart air quality and odor sensor.
  • Sleep mode activates automatically when lights are out with virtually zero noise even lower than low fan speed.
  • Made in Korea with 2 years manufacturer warranty.


  • Having WiFi feature replaced a physical remote control and timer.
  • Not the most intuitive first-time pairing for WiFi connectivity.
  • Hassle quarterly filter change on the deodorization carbon filters.
Winix AM90 Wi-Fi Air Purifier

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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