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The GeneralAire 12904 is the correct replacement for the following air cleaner:
The GeneralAire 12904 AC2 Air Cleaner Cover Assembly is a genuine OEM GeneralAire part that attaches to the air cleaner cabinet. This cover assembly, also known as 4114, is ideal for the GeneralAire AC2 Air Cleaner. This part replaces part number 12905.
The GeneralAire AC2 Air Cleaner is an odor absorbing unit that is designed to be installed in the return air duct system. This whole house air cleaner should be mounted to the inlet air side of a furnace or air handler. GeneralAire is also known by the following spelling variations.