1. Filter material. A good filter material (such as HEPA high-density filter material) can absorb more than 99.9% of pollutants above 0.3 microns.

2. Purification efficiency. If the room is large, an air purifier with a large unit purification air volume should be selected. For example, a 15 square meter room should choose an air purifier with a unit purification air volume of 120 cubic meters per hour.

3. Service life. As the purification filter tank tends to be saturated, the adsorption capacity of the purifier will decrease, so consumers should choose the purification filter tank with regeneration function to prolong its life.

4. Room layout. The air inlet and outlet of the air purifier have a 360-degree circular design, and there are also one-way air inlet and outlet. If you want the product to be placed without the restriction of the room pattern, you can choose a product with a circular air inlet and outlet design.

5. Demand. Choose an air purifier according to the types of pollutants that need to be purified. HEPA has a strong purification function for soot, suspended particles, bacteria and viruses. Catalytic activated carbon has a better purification effect on odors and harmful gases.

6. After-sales service. After the purification filter fails, it needs to be replaced by the manufacturer, so the products of enterprises with perfect after-sales service should be selected.