Air filtration systems designed to improve air quality and control airborne contaminants in construction, renovation, and restoration projects. These self-contained units operate without ducting, feature variable fan speeds, and use HEPA filtration to capture 99.97% of particles 0.3 microns or larger. They can be daisy chained (up to 3 units per outlet), set up within dust barriers to create negative air pressure, and used as air scrubbers in work zones—meeting stringent healthcare standards for cleaner, safer environments.