Air purifier for the object
First, the applicable place
1. A residence that has just been renovated or refurbished.
2. There are elderly, children, pregnant women, and newborns.
3. The residence of people with asthma, allergic rhinitis and pollen allergy.
4. Housing for pets and livestock.
5. A residence that is more closed or affected by secondhand smoke.
6. hotels, public places.
7. the residence of the crowd.
8. the hospital, to stop the spread of disease.
Second, the applicable population
1. pregnant women
2. children
3. Office family
4. the elderly
5. patients with respiratory diseases
6. the driver
