ClenAir Odor Neutralizers are not perfumes or coverups they are true active odor neutralizers. They eliminate unpleasant odors from the air, neutralizing those odors caused by smoke, mildew, pets, cooking, sewer gas, and even airborne chemicals. ClenAir Odor Neutralizers are ideal for residential applications but are also commonly used in commercial settings such as hotels, offices, healthcare facilities, restaurants, veterinarian offices, and more. A single ½ lb. tub will treat up to 200 sq. ft. for up to 30 days with the unique slow-release lid.