What kind of pressure does a PAPR have?

A Powered Air-Purifying Respirator (PAPR) operates under positive pressure. This means that the flow of clean, filtered air is directed into the respirator hood or helmet, creating a slight overpressure relative to the surrounding environment. This positive pressure helps prevent airborne contaminants from entering the breathing zone, making PAPRs highly effective for protection against harmful substances.

In scenarios where workers are exposed to lead or other hazardous materials, positive pressure ensures that any air that could potentially carry those contaminants is kept from infiltrating the equipment. This principle is critical in environments where high levels of exposure can occur, offering enhanced safety for those engaged in lead abatement and similar activities.