CRITICAL SYSTEMS

AIR PURIFICATION SYSTEMS PRIMARILY COMPRISING FILTRATION AND MANIFOLD DISTRIBUTION SYSTEMS FOR PURIFICATION OF BREATHING AIR FOR USE IN THE ASBESTOS ABATEMENT INDUSTRY; NEGATIVE PRESSURE SYSTEMS FOR REMOVAL OF AIR FROM AN ENCLOSED AREA PRIMARILY COMPRISING A HOUSING, BLOWER/MOTOR ASSEMBLIES, FILTERS AND CONTROL PANEL FOR USE IN THE ASBESTOS ABATEMENT INDUSTRY