Winix5510 Air Purifier (New Generation of 5500-2) for Home Large Room Up to 1881 Ft² in 1 Hr, True HEPA, High Deodorization Carbon Filter and Auto Mode, Captures Pet Allergies, Smoke, Dust.

I have extremely narrow sinus passages so it takes very little to irritate them and plug them up. It took years for me to figure out that air pollution has a lot to do with it. This purifier has definitely helped. I keep it on the 3rd speed throughout the day in between the living room and dining room. A half hour before going to bed I move it to the bedroom and set it on turbo. When I retire for the night I turn the speed down to the second from the lowest. I have found that the bedroom door needs to be shut or it doesn't do the job but turning up the speed isn't an option since we're both used to quiet. It isn't that loud but just a bit more than we can sleep with. In the morning I put it back in the main area and turn it on turbo for at least an hour to catch up again to the pollutants. I also bought a pollution monitor at the same time so I can see the actual results in the levels of pm2.5. The reason I don't trust the amber or red colors which are supposed to be an indication of moderate or unsafe levels is, if I move it to an office at night the level shows red even when the monitor shows very low levels of pollution. After about 20 minutes it changes from amber and back to blue. When I move it back to the main living area again, after just the 20 minutes, it goes to red again and then amber and about 15 minutes later it's back to blue. In those 20 minutes the furnace has not come on, a door hasn't been opened and I have been the only object that has even moved, and that was just moving the purifier. The pollution levels also haven't changed in those 20 minutes according to the monitor. Also, certain smells can change the color to red and that includes good smells like fresh baked bread. In summary, I'm glad I bought it because it definitely does as advertised and easily for the 360 sq. ft. but due to the warning colors not making a lot of sense and the auto setting based on that, due to my condition I'd never leave it on the auto setting. One last thing, I was thinking the first filter didn't need to be cleaned for 3 months but when I looked at the instructions again I saw where it was supposed to be cleaned every month. I was shocked at what this filter had collected. It reminded me of a lint trap on a clothes dryer. A lot of this was what we had been breathing in. I have a second smaller purifier coming for the bedroom so I don't need to keep moving this one back and forth.Update: After more than 1 1/2 years it still performs flawlessly and easily does the job. I have not had to change a filter yet. I just vacuum both sides of all the filters and I'm good to go.Update: I have been using this purifier for almost 5 years and this year it has really been invaluable with the smoky air from the Canadian wildfires. I live in SW MN and we have had days where the AQI has been in the red zone with pm2.5 readings well over 160. This thing has 4 speeds and I typically leave it in the 3rd due to it still being quiet but with the air as bad as it was lately, it wouldn't keep up. The pm2.5 level got up to 144 in the house but after running the purifier on high for 8 1/2 hours, it was reduced to just 5. This purifier works great for the dining room, living room and kitchen and we have a different smaller one for the bedroom. I do have a monitor for checking the pm2.5 levels. Also, I have not had to replace a filter yet. The only thing I do is vacuum the filters whenever I feel they need it. If this thing dies anytime soon, I will be replacing it with the same one.Update: I've now had mine for 5 1/2 years and it's still working like new. I've never had to replace or wash a filter. I just vacuum out all 3 filters about once per month. I don't live in a smog filled city so that might help but we did put up with the heavy and unhealthy smoke from the Canadian wildfires last summer and it handled it just fine.

I bought new lr furniture last summer, of course it was made overseas, and I immediately began breaking out from the VOCs in the manufactured wood used (fyi this wasn't cheap furniture). I am very very allergic to formaldehyde, gel candles, essential oils, all those volatile organic compounds. I itch like crazy, which leads to infections and even IV antibiotics...it is really a problem. It usually takes @ 6 weeks for items to offgas enough that I'm not bothered, however I had problems all last summer from this furniture (which are super comfortable recliners so it's where I spend all my time!). I did get a furnace filter with a charcoal layer but it didn't help. I left for the winter and figured it would be dissipated when I came back this May, but after a few days I started reacting again. My allergy meds help, but I don't want to be exposed to the pills or the chemicals. We had some cool weather so I opened a lot of the windows and that helped a lot, until it got hot and they had to close. I was considering putting the furniture in storage for a few months, or selling it and bringing my 30 yr old formal living room La-Z-Boy suite (pristine) back up from the basement, but then started looking at air purifiers. The ones that do VOCs use activated charcoal and are really expensive but the reviews were good for this Winix 5520, it was reasonably priced, plus it was recommended on some allergy sites. I took a chance, and within a few days I was not reacting at all! I got it on June 8 and have waited until now (July 21) to make sure that my problems wouldn't recur, but it is still working like a charm. My house also smells much better and I'm seeing less dust, but that isn't as important as the chemical reduction. Most people don't react to the VOCs like I do, but they are still being absorbed into your body.So I very very thankful for, and highly recommend this air purifier.