Construction Health and Safety Technician (CHST) 2025 – 400 Free Practice Questions to Pass the Exam

A high-efficiency particulate filter (HEPA) is specifically designed to trap very small particles, including those that can be harmful to health, such as toxins, allergens, and other contaminants present in the air. HEPA filters are capable of filtering out at least 99.97% of particles that are 0.3 microns in diameter. This high level of filtration is crucial in environments where air quality is compromised, as it helps to protect individuals from inhaling harmful substances, thereby reducing the risk of respiratory diseases and other health issues.

While enhancing airflow, providing cooling, or serving as a sound barrier might seem relevant to other types of filters or protective equipment, these functions do not pertain to the primary role of a HEPA filter. The effectiveness of a HEPA filter lies in its ability to remove dangerous particles rather than influencing airflow, temperature, or sound. Its main purpose remains centered on ensuring clean breathing air for those exposed to hazardous conditions, making it an essential component in respiratory protection strategies.