WINIX A231 Air Purifier for Bedroom Up to 1110 Ft² in 1 Hr With Air Quality Monitor, True HEPA, Carbon Filter and Auto Mode, Captures Pet Allergies, Smoke, Dust
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Oct 4 – Oct 5
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Style: HEPA Air Purifier
Color: White/Charcoal Gray
Features
- AHAM Verifide at 230 sq ft: Also cleans rooms up to 1,110 sq ft in 1 hour (555 sq ft in 30 minutes, 370 sq ft in 20 minutes, 278 sq ft in 15 minutes)
- Winix True HEPA: Captures 99.97%* of airborne allergens including pollen, dust, smoke, and pet dander, as small as 0.03 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
Description
A231: Featuring a 360° all-in-one 4-stage air purification system, this unit removes 99.97% of airborne particles as small as 0.3 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.
Color: White/Charcoal Gray
Brand: Winix
Product Dimensions: 9.5"D x 9.5"W x 14.6"H
Floor Area: 230 Square Feet
Specification Met: AHAM Certified, Energy Star Certified, ETL Certified, CARB Certified
Color: White/Charcoal Gray
Brand: Winix
Product Dimensions: 9.5"D x 9.5"W x 14.6"H
Floor Area: 230 Square Feet
Specification Met: AHAM Certified, Energy Star Certified, ETL Certified, CARB Certified
Noise Level: 20 dB
Particle Retention Size: 0.03 Micron
Controller Type: Touch Control
Manufacturer: Winix
Item Weight: 7.1 pounds
Item model number: A231
Care instructions: Hand Wash
Assembly required: No
Number of pieces: 1
Warranty Description: 2 year manufacturer
Batteries required: No
Included Components: True HEPA Filter
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 4 – Oct 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: HEPA Air Purifier
Color: White/Charcoal Gray
I've been using this for 2 months now and it's a very nice air purifier. It's in a bedroom and is very quiet at night using the night feature. In normal mode it's not loud per se, but it is something that would distract me trying to get to sleep. Also, the night setting turns the ring of light off, I get distracted by the light a little bit since it's very noticeable in a dark room. Cleaning the filter is very easy, as is disassembly and reassembly. It's definitely something I would get for other bedrooms in the house.
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Reviewed in the United States on July 11, 2025 by FrChristmas
Style: HEPA Air Purifiers
Color: Charcoal Gray
I bought this to have in my bedroom to supplement my other air purifier in my living room which is the Winix C545. That one has been great for 3 years of constant use now with zero problems so I thought I’d stick with Winix for my second purifier. I like the look and size of this new one, perfect for a bedroom. Others weren’t lying about how loud it can be (when compared to the C545, it is quite a bit louder, but think about it- it’s a smaller purifier doing the work of a larger purifier). I keep it on low and it’s fine. High setting is definitely loud, but would be great for people who like to sleep with white noise. It’s not loud enough for me to deduct stars from my review. The air indicator ring light is really nice looking and it does change colors based on air quality quickly (candle smoke, fragrance spray, etc, will all make the air quality light change colors and prompt the fan speed to increase if on auto. It works!) I mostly got this one to help with dog smell and so far I can tell a difference with noticeably fresher smelling air when I come home.
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Reviewed in the United States on May 27, 2025 by Kyle Kyle
Style: HEPA Air Purifier
Color: White/Charcoal Gray
After trying several different brands, this purifier has become my personal favorite. I’ve actually purchased two for my home because my roommate has severe asthma, and this has truly been a game changer—especially since our apartment is fully carpeted. It’s definitely worth the money. The air flow is great, and you can really feel the difference in air quality. It works quietly and efficiently, making it perfect for people with allergies or respiratory issues. If you’re looking for something that actually makes a noticeable difference, I highly recommend this purifier!
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Reviewed in the United States on June 28, 2025 by Catherine Rodriquez
Style: HEPA Air Purifier
Color: White/Charcoal Gray
I like that this has a sleep mode, whereas it is extremely quiet (my fish tank motor is louder) and only the light from the power button is present, which doesn't seem to light up the room but may bother someone who prefers pitch black to sleep. Also, the air smells more crisp and my daughter, who has allergies, has been having far less attacks. It is also light weigh, the filters last forever, it's easy to clean, and you can turn off plasma wave (which I never use because it can be problematic for asthmatics). My only complaint is that I'm not sure how well the air quality sensor works. I've set my son's poopy diaper right next to it and it still said the air quality was good. It also said the air quality was good when I could smell a strong smoke smell from my neighbors burning. However, any time someone is cutting onions in the kitchen, a room away from where the purifier is, it says the air quality is poor to very bad. Other times it randomly says the air quality is poor/bad for no reason discernible to me, and without there being any activities that may have effected the air quality. All in all it does its job and does so very quietly, which is what was most important to me due to having sensory processing issues, especially related to sound. Edit: air quality sensor seems to be working. It's picking up b/o and flatulence. Also, my son has knocked it off the shelf several times and it seems pretty sturdy. The coating on the wire is coming off near the machine. Also, I kept noticing a faint helicopter noise coming from the machine where it does atop a book shelf (not recommended distance from the wall). I was worried it was the fan and quite irritated by the sound. I realized that what was causing it was the slight movement from the fan leading to the wire moving back and forth against the wall where it was pushed between the wall and the shelf. I pulled up more slack and moved the unit out from the wall as much as I could and the sound stopped. Only real complaint : I wish that plasma mode had a lock on it. My kids keep turning it on, which is an issue for the asthma and allergy havers in this house.
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Reviewed in the United States on June 27, 2021 by DeadpanAnn
Style: HEPA Air Purifiers
Color: Charcoal Gray
Works well for its size but the 5520 is the best for your money. Slightly bigger but this is nice if you have a room with less traffic and you need something smaller. Still works well, get the room clean smelling and micro plastic free. Just slower not nearly as good as the other bigger one. The bigger one has the room clean very quick.
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Reviewed in the United States on July 12, 2025 by It's Dank
Style: HEPA Air Purifier
Color: White/Charcoal Gray
We’ve had this on a dresser in our room for about 3 or 4 years now, running continuously. For most of the time, I’ve had it on the “automatic” setting, which means it generally runs at medium speed, turning up to faster when it senses particulates in the air, then returning to medium. It works VERY well, and has reduced my allergies a great deal. The noise level is quite comfortable for us, but we don’t mind a soft fan sound. There are three manually set regular speeds, low, medium and high. The low speed is quite quiet but still a little louder than the night mode speed. If I switch it to night mode, it falls to whisper quiet, hardly noticeable. We use a genuine Winix filter in it, and replace it about every 9 months or so. Replacement is super easy. It has no weird sounds like another reviewer has mentioned, but runs smoothly and efficiently. We’re completely satisfied and would buy this same one again for certain.
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Reviewed in the United States on March 24, 2025 by S. Emigh
Style: HEPA Air Purifiers
Color: Charcoal Gray
College life!!! Looked for an air purifier for my new college student and we came across this one! So happy with it! The power is great and love that it has self adjusting fan speed based on real-time air quality., yet it’s super quiet. We set it up the day we moved him into his dorm room and already the next day or two he could already feel the difference in the air quality in his room…. He suffers from allergies so he appreciates good quality air! Overall I’m impressed and completely satisfied! Would recommend this 100%! It’s a great buy for the price!
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Reviewed in the United States on June 22, 2025 by D. perez D. perez