If you ever see the sun slant into a room at a certain angle, you know how much dust and smoke are in what you thought was clear air. The main indoor pollutants sources include building materials, paints, sealants, cleaning agents, appliance with combustion process, tobacco smoke, cosmetics, and infiltration from outdoor air.
Because people spend most of their time indoors, it is important to make sure that indoor air is in good quality. To minimize air pollutant in your house, consider getting a duct UV air purifier installed. UV air purifier with HEPA filter is effective to remove tiny particles and germs from the air.