Fits Aprilaire/Space-Gard Model No. 2400.
Replacement for Aprilaire Part #401.
Manufactured by American Air Filters.
This is a MERV 10 accordion filter.
It reaches 99% efficiency on particles 5 microns or larger. It improves efficiency and increases longevity of HVAC
systems when properly used and maintained. High-efficiency filter media collects small dust particles before they can
collect on your coils. It improves air quality in the home! This product is listed and rated by Underwriters
Laboratories as U.L. Class 2. It lasts up to six months.