The Honeywell F100 Media Air Cleaner can be easily mounted in a return air duct to capture irritating particles no more than 0.3 microns in size. Made with a durable zinc-coated material, this roll-formed cabinet is resistant to corrosion and general wear and tear. The air filter requires no electrical connections and minimal maintenance. It can also support the weight of a residential gas, oil, and electric air furnaces and evaporator coils. This unit is designed for people with asthma or common allergies.