This compact purifier is also quiet, energy efficient and portable. This compact purifier is also quiet, energy efficient and portable. Cleans and re-circulates the air in a 12-foot x 18-foot room twice every hour Reduces airborne odors, allergens, viruses and germs The Truman Cell filter and Helios Shield odor absorber never need to be replaced Lays flat horizontally or on its side vertically Fits into tight spaces Compact and portable, moves easily room to room Uses about the same electricity as an ordinary light bulb when set on low speed Includes three speed settings, including silent Revolutionary Helios shield creates a UV kill zone with the super sanitizing power of sunlight Neutralizes volatile organic compounds and reduces odors as it circulates the air through its system Whisper quiet Patented Truman cell can capture and kill many airborne allergens and viruses. Cleans and re-circulates the air in a 12" x 18" room twice every hour The Truman Cell Remote control lets you regulate the unit from across the room Lays flat horizontally or on its side vertically; fits in tight spaces New Helios Shield Includes stand.