Fresh-air hoods provide increased protection against airborne contaminants — such as hexavalent chromium, sparks, chemical and molten metal splashes, and flying debris — that are common in automotive manufacturing, metalworking and fabrication, chemical plants and many other industrial processes. These hoods are available in either supplied-air or powered-air-purifying-respirator (PAPR) designs.
- Supplied-air hoods deliver a continuous flow of air through a central (or personal) fresh-air pump using compressed-air fittings and hoses.
- PAPR hoods use a powered fan to pull air through filter packs on the user's belt or hood to provide fresh air.
With a continuous supply of cleaner air, breathing takes less effort, thereby helping the user to remain comfortable and productive. This consistent airflow also discourages re-entrainment of noxious air and thus provides the user with a higher degree of safety.