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
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Availability:
In Stock.
Arrives
Monday, Nov 2
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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
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
Power Source: Corded Electric
Item Weight: 7.1 pounds
Power Source: Corded Electric
Control Method: Touch
Filter Type: HEPA
Floor Area: 230 square_feet
Noise Level: 20 db
Particle Retention Size: 0.03 micron
Controller Type: Touch Control
Contaminant Filtration Capability: True
Special Features: Manual
Filter Class: True HEPA, Carbon Filter, PlasmaWave Technology
Software Update Supported to Date: unknown
Item Dimensions D x W x H: 9.5"D x 9.5"W x 14.6"H
Item Weight: 7.1 pounds
Specification Met: AHAM Certified, CARB Certified, ETL Certified
Brand Name: Winix
Model Number: A231
Model Name: WINIX A231 Air Purifier for Bedroom
Number of Packs: 1
Unit Count: 1 Count
Manufacturer: Winix
Warranty Description: 2 year manufacturer
Included Components: True HEPA Filter
Item Type Name: Air Purifier
Part Number: A231
Color: White/Charcoal Gray
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 2
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 Purifiers
Color: Charcoal Gray
⭐⭐⭐⭐⭐ I’ve only been using this WINIX air purifier for a few days, but I’m already impressed. I noticed the air felt fresher within the first day. If you’re someone who suffers from allergies, is congested from A/C, dust, pollen, smoke, this is honestly a game changer. It was super easy to set up, runs quietly, and just makes the room feel cleaner. If you’ve been on the fence about getting one, this is your sign you won’t regret it!
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Reviewed in the United States on August 5, 2026 by Beth
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
Style: HEPA Air Purifier
Color: White/Charcoal Gray
Nice and quiet. I Bought this for my bedroom. I sometimes oil paint in my bedroom and knew I needed something for the fumes. I do take care not to expose myself too much. I had painted for about an hour. I turned and looked at my unit. The air quality sensor turned red! Bad air quality. This quickly cleared in a few minutes after I saw it turn. This should really help with my allergies too! Note: I am not claiming that this totally removed such toxins however it definitely made me more aware of my exposure and it is definitely clearing something.
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Reviewed in the United States on October 6, 2026 by T.M.
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 Purifier
Color: White/Charcoal Gray
This compact Winix air purifier works really well and makes a noticeable difference in air quality. It’s small but powerful, and it runs quietly even on higher settings. I like how quickly it helps reduce dust and odors in the room. It’s also easy to use and maintain. Overall, a great choice for keeping the air clean in smaller spaces.
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Reviewed in the United States on June 25, 2026 by franklin
Style: HEPA Air Purifier
Color: White/Charcoal Gray
I bought this air purifier as I have a mid-size bedroom (~120 feet; large enough that many smaller purifiers were not rated for that room size). I was also looking for an air purifier with HEPA filtration for allergies and filter changes that were reasonably priced. The official replacement filters run from about $45-50 depending on where you get them and last around a year (aftermarket filters are available and can be had for significantly cheaper, if you're willing to take your chances on those). Many other smaller air purifiers have filters that last for much shorter lengths of time and/or secondary pre-filters and end up costing more per year to run, so in the long term this filter will save you a little money there. Filter changes and cleanings are easy (you should vacuum or otherwise clean the filter every 2 months to extend its longevity), but the directions were a little unclear about how to orient the filter. Based on what I've found, the solid black side of the filter labeled BOTTOM should face the bottom cover of the machine. Noise levels with the filter are reasonable. The lowest speed on automatic is quite quiet and serves as nice background noise. Medium speed is louder but tolerable. High speed is loud, but it's never kicked on automatically for me. Note that this comes with PlasmaWave, which generates some ozone as a byproduct (though from what I've read, this is well below harmful levels). PlasmaWave can be toggled off. However, by default, whenever you turn the purifier on or wake it from sleep mode, PlasmaWave turns on. I would NOT recommend this model if this is would annoy you, but it's a non-issue for me.
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Reviewed in the United States on November 10, 2023 by Glenn
Style: HEPA Air Purifiers
Color: Charcoal Gray
The air purifier WINIX A230 Air Purifier for Bedroom Up... came last June .. 2025. It met my needs. Cleaned air nicely.. was a great unit for my needs. I have seasonal allergies. ⚠️ however it has quite.. fan made a loud noise and motor quit. I M presently in contact with company. 🥺 The company is replacing this air purifier. Overall customer service and unit are worthy of 5 stars⭐️
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Reviewed in the United States on May 10, 2026 by Sharon
Style: HEPA Air Purifiers
Color: Charcoal Gray
I purchased this to reduce dust and particles in my bedroom. I was sneezing and coughing quite a bit and it was disrupting my sleep. This unit is quiet-ish with the noise similar to a white noise wind sound...not too loud but no louder than the separate sound machine I was already using. There is no "mechanical" noise from the machine. After about a week, I noticed that I am no longer sneezing or coughing in my bedroom and dust accumulation is minimal compared to before. My sleep is much better as well. My grandson was recently in my room and told me that the room smelled "fresh"...I am very happy with the purchase. I'm tracking how long the filter lasts. and am sure that it's a highly individualized duration. Hopefully, finding filter replacements and the cost will be reasonable.
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Reviewed in the United States on March 19, 2025 by Mr. Black