Blue Pure 211+ Air Purifier

Last updated date: June 14, 2021

DWYM Score

9.2

Blue Pure 211+ Air Purifier

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We looked at the top Air Purifiers and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Air Purifier you should buy.

Update as June 15, 2021:
Checkout The Best Air Purifier for a detailed review of all the top air purifiers.

Overall Take

Made using a three-stage filtration system, this air purifier is capable of eliminating everything from smoke to pollen to dust mites from the air in your living space. Pet, cooking and other odors are also removed from the air as they pass through the system's activated charcoal filter. The best part about this system is that you only need to press one button to operate it.


In our analysis of 65 expert reviews, the Blue Pure 211+ Air Purifier placed 3rd when we looked at the top 17 products in the category. For the full ranking, see below.

From The Manufacturer

Breathe and sleep easier thanks to Blue Pure 211+ air purifier. With a simple, user-friendly one-button control you can easily select from 3 different fan speeds all of which help to remove allergy causing pollutants and odors. The three-stage filtration process starts with a colorful, washable pre-filter which captures larger particles like dust and pet hair. The air then passes through both a particle and activated carbon filter which catches virtually every airborne contaminant down to a virus in size: pollen, dust, pet dander, mold spores, smoke, allergens and bacteria. Get rid of everyday smells such as food and pet odors naturally without harsh chemicals that mask odors. Filtering air from all sides, millions of ultra-thin fibers of different layers make it less dense than ordinary filters resulting in less clogging, higher airflow and lower noise. In fact, on the lowest setting, the 211+ is described as whisper-silent. This purifier is designed to fit into any room in your house with 2 different pre-filter colors included, blue and dark grey, and many other colors available to purchase separately. With certified results through independent testing from the Association of Home Appliance Manufacturers (AHAM), the Blue Pure 211+ has a clean air delivery rate of 350 cubic feet/minute meaning it will clean the air in a 540 sq. ft. room 5 times an hour.

Expert Reviews

Expert Summarized Score

8.4
5 expert reviews

User Summarized Score

8.8
530 user reviews

What experts liked

Excellent air cleaning performance, quiet operation, large CADR.
- Tech Gear Lab
July 8, 2017 | Full review
Especially effective at removing dust, smoke, and pollen at its highest speed, important for quickly cleaning the air in the room.
- Consumer Reports
This is possibly one of the best quality air purifiers on the market right now. It's especially good at servicing large rooms and has a great modern design. It’s easy to maintain and operate and even though the purifier doesn’t have any smart sensors, it does a wonderful job cleaning the air. The low noise levels and dimmed lights make it a great option for the bedroom too.
- Fresh Air Guide
May 21, 2018 | Full review
It can clear the air in a room up to five times in an hour. It is virtually silent and far more energy efficient than other similar air purifiers.
- Blooming Air
April 9, 2018 | Full review

What experts didn't like

The 211+ is also larger, slightly louder, and more expensive to buy and to operate for five years ($700 to $800) than the Coway, and it’s not as easy to move around the home.
- New York Times Wirecutter
Very high operating costs.
- Tech Gear Lab
July 8, 2017 | Full review
Relatively high filter costs and loud on its lowest speed.
- Consumer Reports
One downside of this filtration system is its cost. The annual air purifier maintenance will cost you about $120. This figure is rather high compared to similar purifiers.
- Fresh Air Guide
May 21, 2018 | Full review
No HEPA filter included.
- Blooming Air
April 9, 2018 | Full review

An Overview On Air Purifiers

The reasons for buying an air purifier can be as numerous as the number of pollutants in the air — and indoors, that number tends to be bigger than most people would expect. Despite the best efforts of the filters in our air conditioners, pollen and dust particles can settle into carpets and upholstery. Mold spores can grow in moist areas. And if there are pets or smoke involved, expect dander and carcinogens to be part of every breath.

Whether you suffer from allergies or just want to eliminate the smell associated with all this particulate matter, a good air purifier can be an essential accessory in any room. But how are they different from the filters we already have in our regular AC?

All that depends on the purifier. Most models circulate air through a HEPA (High-Efficiency Particulate Air) filter, and often more than one. HEPA filters are certified to trap particulate matter as small as 0.3 microns, which covers dust, pollen and most bacteria. Some purifiers boast a medical-grade Hyper-HEPA filter that will go down to 0.003 microns — enough to pick smoke out of the air.

In conjunction with this, the more high-tech air purifiers can employ an extra line of defense. Some models use an optional UV light that renders many micro-organisms sterile, and an activated charcoal filter that can actually pull in and neutralize toxins through electrostatic attraction. There are also models that can ionize incoming particles, which are then sucked in by metal plates or other treated substances.

A word of caution on ozone, though. While they’re less common these days, some air purifiers generate ozone, which, according to the manufacturers, can deodorize and disinfect the air. The jury is still out on those claims, and in fact the presence of ozone in confined spaces can be more harmful than the pollutants you’re trying to get rid of.

For a measure of general effectiveness, you can look for a rating on most air purifiers called the CADR — Clean Air Delivery Rate. It’s a number that represents the cubic feet per minute (CFM) of air that has been cleared of all the particles of a given size. These ratings are recognized by the federal government and can be found on most devices. If you can’t find them, the number is fairly easy to calculate: Just take the CFM on the air purifier and multiply it by the percentage of a certain particle (smoke, pollen, etc.) that the machine can remove.

The Air Purifier Buying Guide

  • One of the first things you’ll want to consider when buying an air purifier is the kind of room you’ll be using it in. When it comes to price, this is usually the primary factor. A workhorse unit that can handle an entire living room and kitchen is going to run you significantly more than a machine that’s meant for a home office for good reason.
  • Are you looking for protection from allergies or just need to freshen up the air? A quick look at the specs for the purifier should tell you what particles it can effectively remove from the air. Again, a HEPA filter is going to do the trick for most common irritants and odors, including pet hair and dust. But if you live in a smoker’s house, look into something more robust.
  • Much like your air conditioner, you’ll likely be keeping an air purifier on for as long as you plan on breathing the air in that room. In a lot of cases, that might be all day, so power consumption matters. Frugal users might want to check out the wattage specs on prospective models. There are also features that can mitigate that electricity drain, such as timers. In most cases, your air purifier won’t be running all the time. It’ll cycle the air through a few times an hour, and you can adjust that number more or less with most models.
  • Another thing to figure into your price point are the filters. Like your AC, there’s upkeep involved. Check not only the price of your filter, but the frequency with which you’ll need to replace it.
  • Since they’re meant for indoor use, most air purifiers are better looking than, say, that wall AC unit you had in your dorm room at college. That said, few people want them as the focal point in a room. If you’re getting one for a small room, you likely want a small purifier — or at least one that’s nondescript.