Modern homes are sealed tightly for energy efficiency. Energy efficient homes are good for your electric bill, but bad for your allergies. Those tight seals trap all kinds of contaminants in your home: pollen that blows in when a door or window is opened, cat dander that hitches a ride on clothing, or chemicals and irritants released by cleaners and perfumes. Pollutants like tobacco smoke, pollen, mold, dust, and animal dander can cause asthmatic and allergic reactions, making homes unpleasant and unhealthy for allergy and asthma sufferers. Other contaminants, like chemically reactive gases and volatile organic compounds (VOCs), can cause allergic reactions and more serious health problems.Allergens such as pollen, animal dander, mold spores, and dust get trapped in the filter. capture chemicals, odors, and gases. Once the dirty air is purified, a fan sends it back into the room as clean air:)
no these are so quiet when we first got them we kept checking to make sure they were running LOL they are nice I have one in my bedroom a different brand and its soooooooooooooooo loud makes it hard to sleep so these are great for that:)