A filter for removing dust and other particles from a stream of air, typically used in the air intake of an internal combustion engine, the output of an air compressor, the supply duct of a forced-air furnace, etc
This device filters the air that goes into your engine Without an air filter, harmful particles would enter your car's engine and cause internal wear and damage
A filtering device designed to clean the air taken into the engine's fuel delivery system Without this filter, dirt and grime would be allowed to find its way into the engine and cause damage to the sensitive machined parts
The air filter for an a/c unit is as important as the refrigerant for correct operation Number one, if the filter is dirty the a/c unit cannot draw and push enough volume of air to effectively cool the home (higher electrical bills) Number two, the filter traps dirt and debris that would otherwise clog the low pressure coil of the a/c unit (which would act as a continually dirty filter and costs lots $75 - $150 to clean) Number three, a dirty filter does not allow enough air to pass over the low pressure coil which causes "slugging" of refrigerant through the compressor plates or valves often causing severe damage (replacement of compressor)