Marketing InformationA filter drier, also known as a filter dryer, removes moisture and particulates - dirt, dust, soot, metal shavings and debris - from an air conditioner unit, ensuring smooth operation and preventing AC compressor failures. Replace the AC drier filter in your home HVAC system based on its operating environment and particulate build-up. Always install a new Emerson™ heat pump filter drier when replacing major air conditioner parts or repairing a leak to maintain system efficiency. Regular air conditioning filter inspections help adjust refrigerant filter drier replacement schedules according to system needs.