1. Just decorated or refurbished residence.
2. there are homes for the elderly, children, pregnant women and newborns.
3. there are homes for people with asthma, allergic rhinitis and pollen allergy.
4. Rearing houses of pets and livestock.
5. or more closed or affected by second-hand smoke.
6. hotel, public place.
7. The residence of the people who are willing to live with high quality.
8. hospital, reduce infection, prevent transmission of disease.