Aprilaire 1413 Upgrade Kit and #413 Filter Replacement Media for Models 2400/2140 Air Cleaners
These are the original, OEM expandable "accordion" style, factory recommended upgrade kit, and replacement filters for the Aprilaire/Space-Gard Model 2400 Air Cleaner.
Assembly instructions are in the box.
The air filter media can last from a few months up to 2 years. It may be necessary to change the media more frequently, in the presence of a high concentration of dust and/or particulates, or if the furnace fan is running continuously.
In any application, the life of the media is dependant upon the total volume of air being moved through it as well as the amount of particulate it is filtering. Inspect your air filter every month for cleanliness.
Filters are expanded into the existing plastic frame
Media Replacement Upgrade Instructions in the Box.