Model # 17000 - Honeywell ® Enviracaire ® QuietCare ™ HEPA Air Cleaner - QuietCare ™ incorporates patented airflow technology with sound reducing features for ultra quiet high speed operation. This unit uses a True HEPA Permanent filter has 99.97% minimum effectiveness at capturing airborne particles as small as 0.3 microns from the air that passes through it. This unit also has Soft touch electronic controls with 3 speeds and indicator lights and the Intelli-Check ™ feature electronically monitors filter usage and easy filter access for convenient replacement. Recommended Room Size 12 x 14 feet. 5 year limited warranty.