The bestselling MA-40 blends style and technology for long-term air cleaning. Ideal for large rooms in homes, apartments, offices, schools, universities, classrooms, hospitals, restaurants, and other businesses. Trusted to remove 99.9% of harmful particles including allergens, odors, VOCs, smoke, pollen, pet dander, dust, smog, contaminants, and more down to 0.1 microns in size.