How to choose an air purifier

1. Choose the right purchase channel

When purchasing air purifiers, it is recommended to try to buy them in regular channels such as large shopping malls, electrical appliance stores, brand stores and mainstream e-commerce websites.

As of 2013, air purifier brands, functions, performance, design, and prices are all very different and dazzling. Consumers are advised to purchase products according to their actual needs, not the more functions the better.

For example, for consumers who need to protect against PM2.5, it is recommended to choose an air purifier with outstanding PM2.5 purification ability. Newly renovated homes can focus on air purifiers with outstanding ability to remove formaldehyde and toluene.

2. Filtration technology

The filtration technology of particulate pollutants is mainly HEPA filter, the quality of HEPA filter is uneven, although some small brands of filter have high filtration efficiency , but the resistance is large, the energy efficiency ratio is relatively low, and it is easy to block and has a short life. Generally, it is recommended to use a deep dust-holding HEPA filter with an electrostatic electret. The electrostatic electret technology makes the non-woven fibers have positive and negative charges. Effectively capture particulate matter in the air. Many HEPA filters claim to have electrostatic electret technology. However, due to technical reasons, the electret charge of many filters will decay rapidly in a short period of time, resulting in reduced filtration efficiency.

You can choose HEPA filters such as 3M electrostatic electrets on the market, which use the same electrostatic electret technology as 3M masks to permanently ensure that the electret efficiency does not decay.

3. Pay attention to the applicable area or particulate clean air volume (CADR)

The strength of the air purifier's purification ability is mainly determined by the applicable area and particulate clean air volume (CADR: provide The rate of clean air) is determined, and the relationship between the two is: applicable area u003d CADR × 0.1. The purification ability of other pollutants should be combined with the applicable area.

4. Energy efficiency ratio and energy efficiency grade

Air purifiers are usually used continuously for a long time. As an important indicator to measure the purification capacity and power consumption of air purifiers, energy efficiency ratio is worthy of everyone's attention. . The higher the energy efficiency ratio and the energy efficiency level, the more energy-efficient the air purifier is and the lower the cost of use.

5. Ozone release amount

Ozone, as a strong oxidant, has a certain purification ability, but it is harmful to the human body. The state has mandatory safety requirements for the amount of ozone released by air purifiers, which is limited to ≤5×10-6% (ozone has a fishy smell).