What are the IQ taxes for air purifiers by 2018?
In 2018, it had been five to six years since the air purifier first captured public attention. During this time, many consumers ended up paying a heavy "intellectual tax" because the technology was still new and not widely understood. For example, some people spent a lot of money on devices that claimed to use negative ion or plasma technology—things we now know are largely ineffective. Today, most people have come to understand that physical filtration and HEPA filters are the real solutions for clean air.
With the introduction of the new national standards for air purifiers, consumers finally had a clearer way to judge the quality of these products. However, while standards help guide the industry, they don’t always help you pick the best product for your specific needs. So, what other pitfalls should you be aware of when buying an air purifier in 2018?
**First, the air is purified in the end.**
Modern appliances often need to be “smart†to catch consumer interest. In the case of air purifiers, “smart†usually means automatic operation when the air is polluted and shutting off once the air is clean. But how do these devices actually determine if the air is good or bad? Most rely on built-in particulate sensors, which can vary greatly in accuracy and cost. The problem is that these sensors only measure the air directly around the unit, not the entire room.
Imagine the air as a bowl of seafood porridge. The pollutants are like tiny scallops scattered throughout the mixture. The purifier only cleans the air right next to it, and once the sensor detects improvement, it stops. However, the area where you actually breathe might still be full of pollutants. To fix this, the sensor should be with the user, not the machine. Only one brand, LIFAair from Finland, has taken this approach with its split-type intelligent control system, offering more accurate and effective smart operation.
**Second, bigger CADR doesn’t always mean better.**
CADR (Clean Air Delivery Rate) is often seen as the key indicator of an air purifier’s performance. Many brands, especially new and internet-based ones, focus on boosting their CADR values—going from 352 m³/h to over 750, even 1000+. However, higher CADR usually means larger machines and louder noise. For most people, such high levels are unnecessary and take up too much space without real benefit.
The rule of thumb is to choose a CADR value that matches your room size. Divide the CADR by 10 to get the recommended area. Anything beyond that is just taking up space and causing unnecessary noise. Also, don’t just look at the lowest noise level—check the performance at different speeds. Some purifiers may not even work effectively at their quietest setting. What matters is achieving true “silent and effective†operation.
**Third, air needs to be stirred for full purification.**
Airborne pollutants are like aerosols, and they need to be fully circulated to be removed efficiently. When air moves, it tends to stick to surfaces. The most effective circulation pattern is to push clean air upward toward the ceiling, let it spread along the walls, and then bring it down to the floor. This creates a full cycle. Rotating airflow is more efficient than straight blowing, and it also reduces discomfort from direct wind.
LIFAair, for example, uses a rotating airflow design that mimics an aircraft engine. Its inclined blades create a strong upward movement, quickly circulating and purifying the air. Other models with two-way rotation or upward airflow are also worth considering.
By being more informed and avoiding common mistakes, you can make smarter choices in 2018. Don’t fall for marketing hype or pay extra for features you don’t need. Choose an air purifier that truly suits your environment and improves your indoor air quality. Stay healthy, avoid pollution, allergies, and viruses—make sure your purchase is both smart and effective.
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