Buy an air purifier first to understand technical terms.

In recent weeks, PM2.5 monitoring data in several cities across the country have shown a sharp increase, sparking public concern about air quality. As smog becomes more visible and tangible, many netizens have expressed their frustration, saying, “The invisible air is now visible and hard to breathe. Every breath feels heavy.” According to reports from Sichuan Suning Appliance, sales of air purifiers have surged over the past two months, with year-on-year growth exceeding 200%. To meet this demand, Suning has launched a special promotion running until February 15th, offering a 50% discount on the second unit when purchasing two purifiers. Online platforms have also seen a significant rise in sales for brands like Yadu, Panasonic, and Daikin. For example, the Yadu Air Purifier saw over 20,000 units sold through its Tmall flagship store between January 13 and 28. **Approximate Classification** **Basic Type + Formaldehyde & Benzene Removal Type** Lin Wubao, manager of Sichuan Suning’s Life Electric Appliances Department, explained that air purifiers on the market come with various functions such as removing formaldehyde, odors, smoke, dust, bacteria, and even adding humidity. However, they are generally divided into two main categories: the basic type, which includes smoke removal, dust filtration, sterilization, and odor elimination, typically priced under 2,000 yuan; and the advanced type, which adds formaldehyde and benzene removal capabilities, often costing between 2,500 and 5,000 yuan. According to current sales data, products around 3,500 yuan are the most popular. At Philips Chengdu, the sales department head noted that with more people staying indoors during the end of the year, especially in newly renovated homes, sales of air purifiers have risen sharply. High-end models excluding formaldehyde and benzene removal have been quickly sold out. **Technical Interpretation** During a visit to Suning Chunxi, the reporter observed that the air purifier section spans hundreds of square meters, with a wide range of options available—from desktop to vertical, mini to large models, and from humidifying to formaldehyde-removing types. With so many technical terms like negative ion technology, electrostatic dust collection, and molecular complexation, it's easy to feel overwhelmed. Here’s what experts have to say. **Activated Carbon Adsorption Technology – Great for Particles** According to Philips’ sales representative, activated carbon is widely used due to its strong adsorption capacity. It captures pollutants like dust, particles, and bacteria. The process involves using an active fan to draw air through the activated carbon filter. This is one of the most common technologies used in air purifiers. **Advantages**: Strong adsorption of harmful substances. **Disadvantages**: Can release pollutants if not replaced regularly, leading to saturation. **Negative Ion Technology – Effective Against Secondhand Smoke** Negative ion technology uses air ion generators to produce negatively charged ions, which help reduce pollutants like cigarette smoke and nitrogen oxides. These ions can neutralize airborne dust and improve indoor air quality. **Advantages**: Reduces secondhand smoke, improves blood oxygen levels, and enhances sleep. **Disadvantages**: Not very effective against formaldehyde and benzene pollution. **Electrostatic Dust Collection Technology – Ideal for Dust Removal** This technology uses high-voltage electrostatics to attract and trap particles. It is commonly found in high-end purifiers from brands like Honeywell. **Advantages**: Efficient at removing particulate matter, including dust, pollen, and smoke. **Disadvantages**: May produce ozone and is less effective against chemical pollutants. **Molecular Complexation Technology – A Friend for New Homes** Sichuan Wuxing Electric Appliance suggests that those looking to remove formaldehyde and benzene should consider molecular complexation technology. This method effectively breaks down harmful gases into harmless compounds. **Advantages**: Highly effective against chemical pollutants from decoration. **Disadvantages**: Requires regular replacement of the complexation solution. **Low-Temperature Asymmetric Plasma Technology – Advanced Sterilization** This emerging technology uses plasma to break down harmful gases and kill viruses and bacteria. It is energy-efficient and offers fast purification. **Advantages**: Rapid virus elimination, efficient odor removal, and increased oxygen levels. **Disadvantages**: Still new, limited availability, and higher cost. **Usage Tips** Different air purifiers are suitable for different areas. A 25-square-meter room needs a purifier with a rated air volume of 200 cubic meters per hour, while a 50-square-meter room requires a model with 400 cubic meters per hour. It's best to move the purifier every few days to ensure even coverage. If you notice a musty smell, clean or replace the filter promptly. Regular maintenance, such as cleaning filters every few weeks, helps prevent secondary pollution.

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