BLUEAIR 2-in-1 Purify + Humidify: Air Purifier and Humidifier with HEPASilent™ and 360° InvisibleMist™ Technology, Top Pour – covers 1,726 sqft in 60 minutes – Perfectly balanced air, one product

Super Quiet and Effective
I love these things. I have this larger one and have bought 3 smaller ones. I love the wifi set up and I love the auto setting. Super quiet and then one morning my wife was cooking bacon and the auto kicked in and ramped up to high to clear the air. Tells me the sensors really work and doing their best to keep your air clean. Also gives you status of filter cleanliness and when to change and air quality throughout the day. I’ve got them spaced out in my two story home and very happy and pleased I got these. These combined with my electromagnetic air filters and blue light in my HVAC unit, I know I am doing their best I can to keep the air in my house clean. Loving it.

Quiet yet effective
Likes: 1) quiet 2) humidifier and air purifier all in one 3) nice design 4) easy to fill
Dislikes: Filters are not washable.
I have been using it for three weeks and the level of dust has gone down drastically in my bedroom.
So far so good!

LIGHTWEIGHT, SUPER QUIET, EASY SET UP, STYLISH, VERY SCANDY
For my kittehs playroom. One of my kitties has dust allergies so, it’s best for all to have this. The room is roughly 180 sq ft. The room is very minimal with 2 dog-sized beds with washable slip covers. They are washed once a week. I wash the water bowls every day. I did use the electric water bowls, but the gunk and build-up daily were too much, and the filters would become. I also wash their toys once a week. The floor is vac’d once a day & with this Blue Air, I now have no worries for my kitties. Of course, there are windows for fresh air. However, with imposing frigid temperatures, this is so fab! Blessings to all. Fur babies first!

A Sophisticated (and QUIET) Air Filter
I am reviewing the BlueAir 211i Max and 411i Max series in this review as I bought both – one for living room and one for bedroom. Bottom line, these are very impressive units and for the price I am impressed and pleased with each for functionality and effectiveness.
Pros for the BlueAir series. very very quiet. On auto maintenance mode – you can’t hear the thing. These are smart machines. You can monitor every aspect of your air quality through the app. You can adjust the control lights from off to bright. It tracks months of air quality data for the room it is in by month, week, day. You can adjust from sleep mode, auto, and 3 fan speeds using the app remotely. It tells you how much filter life is left. It tells you the outside air quality and compares to your inside.
Example of its effectiveness; I was sautéing some Italian sausage and onions, the unit detected the particles and immediately went into high mode for about 5 minutes until all the odor was eliminated and then went back to silent. The front LED bar changes from Blue to Green, orange and red depending on the air quality while at the same time adjusting the fan speed to address the corresponding level of air quality indicated. Same thing happened when smoking some meat on the back patio. I left the door open to bring in the food, the unit detected the smoke and the front LED went red. After closing the door, it ran on high mode until the LED indicators began to regress back to blue and the fan speed decreasing accordingly until all the smoke odor was eliminated from the room.
Cons for the BlueAir product. It is a bit pricier than other options – but for all the differences – so far, I feel the Blue Air product is definitely worth the price difference, for me at least.
What I have not addressed: the longivity of the products; the life of the filter; ease of maintaining; Both of my purchases are within the first month;

Lo compré hace un par de semanas y me parece excelente, vivo en CDMX y el aire es de mala calidad, ahora estoy durmiendo toda la noche y se ha reducido mis alergias y el asma.

Highly rated by multiple independent review cites, good controls with variable air speeds, no sign of vibration, and at lower speeds can act as white noise source to mask background noises from interfering with sleep. Replacement filters not overly expensive compared to similar units. Unit comes with couple of different color ‘socks’ that slip over outside of unit, allowing some matching to room decor, but more importantly act as a prefilter that protects and greatly extends lifetime of more expensive main ‘hepa style’ filter. Also, take manufacturer’s filter replacement recommendations with huge grain of salt. Independent tests indicate that in many use scenarios, with prefilter sock installed, the main filter can last for several years. All hepa-style filters actually become more effective after used for a while and partially loaded with particulates; so as long as they pass good airflow they will continue to filter well. The only exception is that the charcoal coated subfilter, which most oem filters for this unit seem to have for absorbing odors and airborne chemicals etc. , lose effectiveness long before the particulate filter becomes clogged. But there’s little evidence that the thin charcoal layer in units like this actually do much even when new – effective charcoal-based gas absorbing air filters are really only found in multithousand $$ air cleaners with filters 6+ inches thick and containing several kilos/lbs of activated charcoal. Got unit as Amazon refurb, was good as new and excellent deal.