DESC: For anyone who wants to create a healthy living environment by purifying the entire home, the AllerAir I 6500-AH Air Handler is the perfect solution. This ducted air purifier attaches to central HVAC systems and removes harmful impurities from the air including pet dander, dust, pollen, tobacco smoke, bacteria, odors and fumes. This unit covers up to 5,000 sq. ft. and is extremely quiet. The AllerAir I 6500-AH Air Handler is great for use in large homes and small commercial establishments.