What is a Furnace Air Filter?
A furnace air filter is device that is meant to clean the air as it passes through the furnace. There are a number of reasons furnace air filters are useful and important. Not only do they increase efficiency, they also increase the safety of operating furnaces and may affect the health of those who are in the home. Just like lint and other materials that can build up in a dryer or stove vent and be highly flammable, materials that build up in an air duct can also cause a fire. Duct fires can travel fast and the ducts provide a natural conduit for fires to travel along. An air filter can help remove solids that may otherwise get caught in the ducts and ignite.
