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

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.

This is my third Winix air filter. I love them all. This one is great for a bedroom. They operate as described, have easy to change filters, and are good looking. They also have a sleep mode that allows you to run them at night without the nuisance of a light.

we use the air purifier in our bedroom for our allergies. easy to use. Quiet fan. Keeps air fresh and control any odors. We use the timer while sleeping.

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.

It's great I love it.

We love the air purifier.. Dr recommend it .. it is compact and attractive .and runs quietly.. lthe nstructions we’re easy to understand .. . and we feel it’s helping us especially at night ..

Excelente producto. Cumplió las espectativas

As a long-time owner of a Winix 5500 that has operated nearly 24/7 in my living room for many years without issue, I thought it was time to upgrade my bedroom air purifier to a Winix product as well. However, I'm pretty underwhelmed by the product. I'll hit you with the Pros and Cons if you're short on patience, but go into further details after if you're curious:PROS:- Competitively priced for the performance it provides and sq ft coverage it provides- 1-year filter life, cutting down on waste and costsCONS:- Bearing noise- Motor noise- Fan imbalance- No way to turn off the air quality indication light when the unit isn't in sleep modeDetails:Because my aforementioned Winix 5500 has been so reliable and whisper quiet for so many years, I was confident going into my purchase of this smaller Winix for my bedroom. However, after living with it for ~2 weeks now, I'm pretty underwhelmed by the unit in terms of quality and noise.The major problem I have is the fan inside the unit itself. Right off the bat, upon turning the unit on, you'll notice a moderately high-pitched scratching or scraping noise, which I can only describe as bearing noise. It sounds like the fan uses a ball-bearing setup, which is very robust and reliable, but results in the noise described above. Additionally, the motor that drives the fan hums. These noises are present at all speeds, regardless of Plasmawave being enabled or not, and only the motor noise fades off in sleep mode. I was actually so surprised by this medley of off-putting noise, especially because NONE of the reviews mentioned this, that I contacted Winix. After sending a video, they determined that the unit was defective. Upon receiving my replacement unit, I was disheartened to hear that this unit exhibits the same exact noises. It's not a defect, that's how this thing is designed. See an attached picture of the waterfall graph to see empirical evidence of these noises. The graph (purple in color, from bottom to top) starts with the unit being off. You'll notice as soon as I power the unit on, the high pitched noise appears around 2 KHz, and the motor noise around 500 and 600 Hz. You can also notice the intensity of said noise, most notably the motor noise, increasing as the fan speed does. The next jump is when I disable automatic fan speed and set it manually to Low, then another jump when it's set to medium.Additionally, you can also feel the fan moving within the unit when not in sleep mode, as if it's imbalanced. It's not a buzz, but a wobble. You can feel the entire fan wobbling around inside of the case.I live in a city and the white noise that fans and air purifiers provide help sleep through the hustle and bustle and sirens outside overnight. Sleep mode on this unit is very quiet which is nice, but too quiet for my needs. Because of this, I tend to never use sleep mode which means two things: Noise and the AQI light remaining lit all throughout the night. Fine, I can cover up the light, but then there's the noise. So, I have to run the fan at the medium setting so that the sound of the airflow drowns out the motor and bearing noise.The purifier does it's job of cleaning the air, it makes a noticeable difference in the air quality and smells fresh in my bedroom. Unfortunately, it doesn't live up to the standards I had for Winix based off of my experienced with their other units. At first I thought it was a QC issue, but it's actually just poor component choices and design. Hence the 3 stars. I won't be returning the unit, because I like the filtration performance and I can live through the noise it generates, but if you're looking for silent operation or a pleasant white noise machine, look elsewhere.UPDATE 6/2/2025:After receiving my replacement unit 18 months ago, the noise became louder making it basically intolerable. I once again reached out to Winix for warranty support and after sending them a short video of the noise, they sent me a replacement unit no questions asked. I am happy to report that this replacement unit is whisper quiet! The date code of the 2nd replacement unit states it was manufactured in 2025 and the serial number may indicate that it was produced in a different location or using different parts suppliers. This indicates to me that Winix identified a QC or parts supplier issue and rectified it with later A230 production units. It would also explain to me while so many other reviews on here did not experience the same issues as I did. Additionally, the plastic appears to be of a slightly bluer tint, so perhaps different plastic as well? The fan appears to be slightly imbalanced and wobbles within the housing but really the main concern for me was the noise it created, which is now gone. I'll keep this review at 3 Stars, but had I had a better initial experience with this product and their warranty support, it'd probably be a 4 Star product.