I started thinking about this question a lot because I was living in Beijing, and the “airpocalypse” struck:I had a cough I couldn’t shake for weeks, so I started doing research into air purifiers. Unlike another answer here, I wasn’t concerned about allergens like pollen. I was concerned about the very small particles of smog, mostly 2.5 microns and below. Can air purifiers get particles that small?I saw tests done by a doctor in his own apartment in Beijing. He used a laser particle counter to test for the very small particles that can penetrate deep into our lungs. His results were straightforward: the purifiers he tested reduced the particulate in his home.So I went out to buy one of the purifiers he tested, and wham!That leads me to how I’ll answer this question. If you do a search for purifiers, it’s easy to conclude that you need to spend a fortune. I’m not going to point to a single brand, but I’ll talk about test data from multiple sources that leads to a conclusion:You don’t need to spend a fortune to protect yourself from air pollution.1.

My Tests in BeijingI’ve tested several big brand purifiers in my apartment in Beijing, including that fancy IQ Air above.Averaging over dozens of tests, I found no correlation between price and effectiveness.(All of the data and methods are publicly available. I also published instructions for making your own purifier.)2. Another Citizen Scientist’s Home TestsAnother dedicated nerd with very fancy test equipment published tests of several big brand and less-big brand purifiers in the US. Here’s what he found:His tests similarly found that the most expensive purifiers were not always the best and that several very affordable brands performed very well.3. Shanghai Consumer Protection Bureau TestsPerhaps an even more extreme test of this idea are the tests of the Shanghai Consumer Protection Bureau. These tests might be more extreme because they tested many machines made in China for the Chinese market, and China is not known for high-quality products. But here’s what they found:Notice that the Sharp and Electrolux were among the cheapest machines, but they removed as much particulate as brands that cost more than twice as much.

(Nerd note: these tests use different methods. For example, the tests in #2 and #3 burn source of pollution in the room. My tests and the doctor’s tests use naturally occurring air pollution in Chinese apartments. That means we can’t translate percentages in one test to another test; cost of bryant perfect air purifierinstead, we should compare price and effectiveness within each test.)ionic breeze air purifier warrantyResults are similar from other third-party tests of purifiers such as the CADR tests of the Association of Home Appliance Manufacturers and Consumer Reports (results behind a pay wall).cold air intake mopar fiat 500Conclusion: How to choose a purifierAll of this test data points to three simple conclusions:1.

We don’t need to buy the most expensive machines to get clean air.2. There are many options on the cheap end of the scale (including DIYs!) that remove as much particulate as the big boys.3. Choosing a purifier is as simple as checking out the empirical data linked above and selecting the best combination of effectiveness and price.After I did all of these tests and read other people’s tests, I now use simple DIY purifiers in my apartment in Beijing. I know several people who have paid for that 14,000 RMB ($2,138) IQ Air I first read about; in my home, I’m protecting my lungs for and paying about 3% of that price.Studies show they are not effective in the doses seen in most commercial machines, and they create ozone. I wrote a simple explanation of ionizers in this answer. (Also check out Consumer Reports’ warning against ionizers.)2. Avoid ozone machines, unless you’re not planning on being in the room.Ozone can clean the air, but it’s harmful to humans. To give a sloppy analogy, it’s kind of like filling your home with landmines to protect against intruders.

Consumer Reports says: “We also suggest that you avoid dedicated ozone generators entirely.” Find a Proshop/Service Dealer Life with Air Conditioner Benefits of Daikin Technology Daikin at a Glance Daikin for All Your Needs Daikin Around the World Daikin's innovative solutions to meet our customers' needs Urusara 7 - Experience the difference After Sales Services Top Free Call Center - We’re here to help Daikin Vietnam, a member of Daikin Group Become a Daikin Dealer Why Become a Daikin Dealer Daikin air purifier decomposes and removes dust, odors, bacteria, and other undesirable airborne components. You can get crystal clean air for your living environment. Daikin Streamer Discharge Technology eliminates harmful substances Components causing odor are absorbed by the filter and decomposed by Streamer Discharge. Six-layer powerful decomposition and removal configuration Effective against nasty things such as mold, bacteria, viruses, cigarette, hazardous chemical substances such as diesel particulates and exhaust gas, allergens such as pollen and mites, house dust and pet hair, etc…

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