WINIX A231 Air Purifier for Bedroom Up to 1,180 Ft² in 1 Hr With Air Quality Monitor, True HEPA, Carbon Filter and Auto Mode, Captures Pet Allergies, Smoke, Dust
WINIX A231 Air Purifier for Bedroom Up to 1,180 Ft² in 1 Hr With Air Quality Monitor, True HEPA, Carbon Filter and Auto Mode, Captures Pet Allergies, Smoke, Dust
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WINIX A231 Air Purifier for Bedroom Up to 1,180 Ft² in 1 Hr With Air Quality Monitor, True HEPA, Carbon Filter and Auto Mode, Captures Pet Allergies, Smoke, Dust

587 ratings

Key item features

  • Powerful Coverage: Cleans rooms up to 1,180 sq ft in 1 hour, with AHAM verification for 246 sq ft, ensuring efficient air purification for various room sizes.
  • Advanced Filtration: Features a 360 all-in-one 4-stage system including True HEPA, capturing 99.99% of airborne allergens and ultrafine particles as small as 0.01 microns.
  • Odor Reduction: The Carbon Filter effectively reduces VOCs and household odors from cooking, pets, and smoke, while also prolonging the True HEPA Filter life.
  • Smart Operation: Equipped with an air quality sensor that measures and adjusts fan speed in real-time, and an Auto Mode for efficient, cost-effective cleaning.
  • Quiet Convenience: Operates nearly silently on its slowest speed and includes a Sleep Mode that automatically activates in darkened rooms for energy-efficient operation.
  • Maintenance Indicator: A Filter Replacement Indicator LED illuminates to signal when filters need to be replaced, ensuring continuous optimal performance.
  • PlasmaWave Technology: Incorporates PlasmaWave Technology to help reduce the presence of airborne pollutants, allergens, and impurities.
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Specs

Filter type, HEPA, Activated CarbonCoverage area, 360 sq ftClean air delivery rate, 147 CFMContaminants removed, Bacteria, Viruses, Dust, Pollen, OdorMicroparticle performance rating, 99.99Brand, Winix

About this item

Product details

The Winix A231 features a 360° all-in-one 4-stage air purification system, this unit removes 99.99% of airborne particles as small as 0.01 microns in size. Winix’s PlasmaWave® Technology may help to reduce the presence of airborne pollutants, allergens, and impurities. The unit’s built-in Smart Sensor detect and monitor the quality of air in your environment and provides a visual representation of your current air quality. When in Auto Mode, the unit automatically adjusts fan speeds to ensure efficient and cost-effective cleaning. Activate Sleep mode for quiet, energy-efficient operation.
  • AHAM Verifide® at 246 sq ft.: Also cleans rooms up to 1,180 sq ft in 1 hour (590 sq ft in 30 minutes, 393 sq ft in 20 minutes, 295 sq ft in 15 minutes)
  • 𝐖𝐢𝐧𝐢𝐱 𝐓𝐫𝐮𝐞 𝐇𝐄𝐏𝐀: Winix True HEPA captures 99.99%* of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.01 microns
  • 𝐅𝐢𝐧𝐞 𝐌𝐞𝐬𝐡 𝐏𝐫𝐞-𝐅𝐢𝐥𝐭𝐞𝐫: The first line of defense against the largest airborne particles found indoors
  • 𝐂𝐚𝐫𝐛𝐨𝐧 𝐅𝐢𝐥𝐭𝐞𝐫: Reduces VOCs and household odors from cooking, pets, and smoke. It is designed to catch airborne particles found indoors, which also helps prolong the True HEPA Filter life
  • 𝐏𝐥𝐚𝐬𝐦𝐚𝐖𝐚𝐯𝐞 𝐀𝐢𝐫 𝐂𝐥𝐞𝐚𝐧𝐢𝐧𝐠 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲
  • 𝐒𝐦𝐚𝐫𝐭 𝐒𝐞𝐧𝐬𝐨𝐫𝐬 + 𝐀𝐮𝐭𝐨 𝐌𝐨𝐝𝐞: Built-in air quality sensor measures and adjusts fan speed in real-time
  • 𝐔𝐥𝐭𝐫𝐚-𝐐𝐮𝐢𝐞𝐭: Nearly silent on slowest speed
  • 𝐋𝐢𝐠𝐡𝐭 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐞𝐝 𝐒𝐥𝐞𝐞𝐩 𝐌𝐨𝐝𝐞: Unit automatically activates its quiet, energy-efficient Sleep Mode when room is darkened and returns to Auto Mode in the presence of light
  • 𝐅𝐢𝐥𝐭𝐞𝐫 𝐑𝐞𝐩𝐥𝐚𝐜𝐞𝐦𝐞𝐧𝐭 𝐈𝐧𝐝𝐢𝐜𝐚𝐭𝐨𝐫: When the filters need to be replaced, the Filter Replacement Indicator LED will illuminate
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Specifications

Filter type

HEPA, Activated Carbon

Coverage area

360 sq ft

Clean air delivery rate

147 CFM

Contaminants removed

Bacteria, Viruses, Dust, Pollen, Odor

Warranty

Warranty information

Limited 2 Year Warranty

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warnings

Customer ratings & reviews

4.6 out of 5 stars
stars
587 ratings182 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars80% (470)
  2. 4 stars11% (66)
  3. 3 stars2% (14)
  4. 2 stars2% (11)
  5. 1 star4% (26)

Reviews summary

Pros

  • : Produces effective white noise for sleep.
  • : Operation requires few steps and cleaning remains straightforward.
  • : Available at a price that matches similar products.
  • : Provides sensitive detection of air pollutants.
  • : Offers multiple speed settings for customization.

Neutral

  • : Can eliminate mild odors, but struggles with strong or persistent ones.
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Showing 1-3 of 182 reviews

Jan 9, 2026
Reviewer name: Beth
Top Reviewer
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

My package arrived early and in terrific shape. The instructions are very minimum with 1 visual on how to open the bottom to find the filter. Unfortunately, the instructions did not tell me to take the filter out of the plastic bag yet, I discovered it right away. Running the air purifier with the plastic bag around the filter could cost troubles. So please check that out and an owners instruction manual would be helpful. I have many allergies that end with days off work and a couple trips to the doctor office. My doctor recommended a humidifier and I suggested air purifier. She thought that would be a good idea. Day 1 %26 I'm very thankful for my air purifier, the rooms smell cleaner, and hopefully fewer allergens and mold spores in my home. Thanks, Walmart!

Helpful?1QYVJM3WZ857310494046
Sep 21, 2026
Reviewer name: Kelly
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Excellent Air Purifier. Quick delivery

Helpful?1QYVJM3WZ857310494046
Oct 21, 2025
Reviewer name: anonymous
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Carbon filter removes toxic VOC's, (Vol Org Chem).

Quick delivery. Neighboring business to the north of me had open container of some nasty chemical that smelled like fingernail polish remover. I was breathing this toxic chemical 24/7 until I got sick in my lungs. Activated charcoal absorbs VOC's so at least my bedroom can have clean air. Lungs are getting better. Easy to set up, easy to use, works good. All the buttons on the display need to be back-lit, not just some of them. It needs some sort of hand-grip on the outside. A bit too costly. Should be $40, not $80 . I really like the color changing indicator of room air quality, (ie, clean or dirty).

Helpful?1QYVJM3WZ857310494046
Current price is $97.24
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