Ultravation 5? Filter Assembly
Today, indoor air is often more polluted than outdoor air, due largely to advanced construction and renovation techniques that create tighter, more efficient houses. Since tighter houses tend to trap airborne microorganisms, allergens and debris, most indoor air pollution is made up of microscopic particles including smoke, fine dust, bacteria, viruses—and allergens like mold spores and pollen. The accumulation of these elements can cause inside air to be as much as 100 times more polluted than outdoor air.