Glasfloss ZL Air Filter

A MERV 11 rating indicates that these filters are highly effective at capturing smaller particles like pet dander, mold spores, and smoke, in addition to larger debris like dust and lint. It strikes a strong balance between thorough filtration and maintaining proper airflow for your HVAC system.

For optimal performance and to keep your HVAC system running efficiently, you should replace these filters every three months. If you have pets or live in a particularly dusty environment, you may want to check them sooner.

Yes, the Glasfloss ZL is designed for versatility. Its durable metal frame and high-capacity synthetic fibers make it robust enough for demanding commercial HVAC systems while remaining perfectly suitable for residential furnaces and central air units.

The nominal size is the industry-standard label used for shopping, while the actual size is the precise measurement of the filter. Always double-check your current filter's dimensions or your system's manual to ensure the 9.5 x 9.5 x 0.875-inch actual size will fit your specific housing.

The engineered gradient structure allows the filter to trap larger particles on the outer layers while capturing finer particles deeper within the media. This design prevents the surface from clogging prematurely, giving you a higher dust-holding capacity and a longer service life.