Factory original Aprilaire No. 413 fits the Aprilaire 4400 and 2410 air cleaners. No. 413 filters also fit the Aprilaire / Spacegard 2400 if the Media Upgrade Kit No. 1413 has been installed. Manufacturer recommends replacing filter at least once a year.
Minimum Efficiency Reporting Value
Rating system created for air filters with a scale that represents the worst case performance of a filter when dealing with particles in the range of 0.3 to 10 micrometers. The scale is from 1-16. The higher the MERV rating the greater the percentage of particles that will be captured.
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