Reader's Question >>>
“The family wants to buy an air purifier, but the market is full of options. Can you ask the reporter to help us get expert advice?†Ms. Wu called in and said that with the increase of winter smog, she wanted to add an air purifier to her home. However, with so many products available at varying prices, she was confused and hoped for more professional guidance.
Reporter’s Interview >>>
The reporter found out that there are numerous air purifier brands on the market, but not all of them are reliable. Some manufacturers even mislead consumers through misleading advertising and vague marketing tactics.
Choose Based on CADR at the Same Price
Quality inspectors suggest a key factor when purchasing: Clean Air Delivery Rate (CADR). This measures how effectively the purifier can clean the air. When the price is similar, a higher CADR value means better performance, as it indicates faster removal of pollutants.
Check CCM for Long-Term Performance
Air purifiers are different from other appliances because they need both power and durability. A good purifier should have strong purification ability and long-term effectiveness. The 2016 national standard for air purifiers now includes two core metrics: CADR and Cumulative Cleanliness Measurement (CCM). While CADR shows how fast the purifier works, CCM reflects how long the purifier can maintain its efficiency before needing maintenance or replacement.
Don’t Be Tempted by High Prices
According to a comparison test conducted by the Jiangsu Quality Supervision Department on 20 air purifier brands, there is no direct correlation between price and performance when it comes to removing particulate matter. So, consumers don’t need to go for the most expensive model—just choose one that fits their needs.
For example, if the room height is between 2.4 to 2.6 meters and the area is around 16 square meters, you can estimate the suitable purifier size using CADR. The formula is: applicable area = CADR × k, where k ranges from 0.08 to 0.12. Choosing a purifier that’s too small won’t work well, while one that’s too big may cost more and use more energy unnecessarily.
Replace Filters on Time to Avoid Secondary Pollution
One important thing to remember is to replace the filter regularly. According to surveys, many users aren’t aware that filters need to be replaced. In fact, 34.9% of people don’t know this. Experts warn that the filter is the core component of the purifier, and if it’s not replaced in time, it can become saturated, reducing its ability to remove pollutants like PM2.5 and potentially causing secondary pollution.
Also, keep in mind that air purifiers do not generate oxygen. If used for a long time in a closed space, the oxygen level may drop, which could affect your health. It’s recommended to open windows periodically when using an air purifier to ensure proper ventilation.
In short, choosing the right air purifier involves understanding key metrics like CADR and CCM, avoiding unnecessary expenses, and maintaining the device properly. With the right approach, you can make an informed decision that suits your home and lifestyle.
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