Most popular general purpose air purifier this unit treats all the various types of pollutants which contribute to poor indoor air quality. It features 18 lbs. of activated carbon to adsorb chemicals gases and odors and a medical-grade HEPA filter to remove 99.97% of all airborne particles down to 0.3 microns. Filtration System: 18 lb. carbon filter 2.5 depth medical-grade HEPA easy-clean pre-filter. Surface Area of Carbon Media: 2250 acres. HEPA: Medical-grade removes 99.97% of all airborne particles 0.3 microns in size. Surface Area of HEPA Media: 4778 square. CFM: 400. Speed: 3-speed. Available Colors: Black Sandstone White Pewter Red Copper Silver Glossy Black. Voltage: 115/60Hz or 230/50Hz. Amps (115V/230V): 1.3/0.5. Cord Length: 8 . Maneuverability: 4 x 2 wheels. Filter Access: Pre-filter bottom no tools Main filters bottom with screws. Motor Details: Motor with a blower wheel. Number of Units per Pallet: Multiple. CSA/UL: Yes. Dimensions: 20.5 H x 15 dia.- SKU: ALLRRI040