Glasfloss ZL 20x25x4 MERV 10 (FPR 5-6) 4 Inch Pleated Air Filters. (5-Pack). Actual Size: 19-1/2 x 24-1/2 x 3-3/4

For premium performance, the Glasfloss ZL 20x25x4 MERV 10 air filter can be used in HVAC systems for commercial and residential properties, school systems, government institutions, and industrial applications. The MERV 10 filter features the latest in media technology to achieve a MERV 10 rating per the ANSI/ASHRAE 52.2 Test Standard, while maintaining low pressure drop and long service life. Glasfloss Z-Line Series MERV 10 filter media is laminated to a heavy-duty, galvanized, metal backing that stabilizes the media during operation. Incorporates 100% synthetic fibers which are electrostatically charged, thermally bonded and are manufactured in an engineered gradient structure. The thermally-bonded fibers do not absorb moisture. The engineered grading structure media supports high dust-holding capacity and long filter service life. Glasfloss Industries is the oldest American owned and operated manufacturer of HVAC filters, established in 1936.

• Actual Size: 19-1/2 x 24-1/2 x 3-3/4 | Nominal Size: 20x25x4
• Filtration Rating: MERV 10. Comparable to MPR rating 600 to 800, or FPR 5-6 rating.
• Improved MERV 10 Filtration with similar air flow and resistance as a MERV 8 filter. Durable & Long Lasting: Heavy duty frame won't buckle.
• Made in the USA. Ideal for residential, commercial, schools, health care, & industrial filtration applications.
• For optimal performance, recommended to change at least every 3 months.