RENPHO Air Cleaner and Purifier for Allergy and Asthma， Air Purifier with H13 HEPA Filter for Home Large Room 960 sq. ft. Good indoor air quality is important. In fact， according to the Environmental Protection Agency， the concentration of some pollutants is often 2 to 5-times higher indoors than outdoors. Irritants such as animal dander， radon， smoke， wood burning， cooking and more are common in homes. Considering that the average American spends some 90% of their daily lives indoors， that could mean breathing a lot of polluted air. What can you do. Get an air purifier. The right one can significantly decrease the number of pollutants in your home-and help you breathe better. The RENPHO HEPA air purifier with 5-Stage Filtration provides 360° purification for your indoor air. It can improve your indoor air quality and help your family breathe better while keeping your household healthier. The air cleaner is especially well-suited for those who have babies， the elderly， and pet owners who suffer from allergies. It adopts the HEPA filter and can help capture and reduce ultra-tiny particles as small as 0.3-microns， eliminate airborne allergens such as: Allergy Symptoms: allergic to dust， seasonal allergy， chronic allergies， asthmatic， coughing， sneezing， sinusitis， sinus congestion， allergens. Particles: pollen， dust， large dust particles. From Pets: odors， hair， fur， lint. Smell: cigarette/smoke， kitchen cooking fumes， weed smell， wildfire， perfumes.