What is the function of a negative-pressure enclosure during asbestos work?

The function of a negative-pressure enclosure during asbestos work is primarily to contain air and prevent the escape of hazardous asbestos fibers into the surrounding environment. This system works by maintaining a lower air pressure inside the enclosure compared to the pressure outside of it, effectively creating a barrier that prevents any airborne contaminants from leaking out during the abatement process. By doing so, it helps to protect workers, other building occupants, and the general public from exposure to asbestos, which is known to pose serious health risks.

Properly functioning negative-pressure systems are equipped with HEPA filters that trap the asbestos fibers before they can escape, further ensuring that the air being exhausted from the enclosure is free from contaminants. This is a critical safety measure during asbestos handling and removal, aligning with regulations designed to minimize occupational and environmental exposure to harmful substances.