This Tier1 16X28X6 air filter is rated at MERV 11 to capture 90% of particles, 1-3 microns in size and is a replacement for: Aprilaire/Space-Gard #401.
Superior frame strength utilizing double wall construction and die cut fingers.
Replacement for: Aprilaire/Space-Gard #401
High-efficiency filter media collects small dust particles before they can collect on your coils.
This product is listed and rated by Underwriters Laboratories as U.L. Class 2