Carrier item number FILXXCAR0020 is a Air Cleaner Filter with standard features that include: • Easy filter access - Using this air cleaner allows homeowners easy filter access. They will no longer have to go inside the furnace to access or change the filter. • Improved indoor air quality (IAQ) - When used with the Carrier high-efficiency FILCC media filter, the media cabinet provides homeowners with improved IAQ. • Trouble-free installation - No electricity is required. • Nearly maintenance-free operation - The only maintenance required is replacing the media filter cartridge when needed-before each heating or cooling season or at least once a year, depending on conditions.