Which of the following are considered proper ventilation for nail salons?

Local exhaust ventilation is considered proper ventilation for nail salons because it effectively removes airborne contaminants, including fumes and dust, from the workspace. This type of ventilation system specifically captures pollutants at their source, such as when filing nails or applying products that emit volatile organic compounds (VOCs). By minimizing the concentration of harmful substances in the air, local exhaust ventilation helps to maintain a safer environment for both clients and technicians.

While window fans, central air conditioning, and portable air purifiers can contribute to overall air circulation and comfort, they do not specifically address the removal of hazardous particles and odors generated during nail services. Hence, they are not sufficient standalone solutions for ensuring the air quality standards necessary in a nail salon setting. Local exhaust ventilation systems are designed with the specific goal of improving indoor air quality and ensuring compliance with health and safety regulations.