Additional features: 40' cord, seven-position height adjustment and disposable paper bag collection system (sold separately). Traps 100% of dust mites, ragweed, pollen; includes stainless-steel pre filter screen and washable HEPA filter that captures 99.97% of all particles down to 0.3 microns. UL approved for commercial use. OSHA compliant. Meets LEED requirements. Manufacturer's warranty: two-year parts and labor. Shpg. Wt: 22.7-lbs. Sold by the each.