Glasfloss ZL 19 7/8" x 21 1/2" x 1" MERV 10 air filter replacements for Carrier, Bryant, and Payne. ● Actual Size: 19 7/8 x 21 1/2 x 7/8 (19.875 x 21.5 x .875) | Nominal Size: 19 7/8 x 21 1/2 x 1 | 1 Inch Depth Filter ● Filtration Rating: MERV 10. Comparable to MPR rating 600 to 800, or FPR rating 5 to 6. ● Pressure drop: Comparable to MERV 8. Durable & Long Lasting: Heavy duty frame will not buckle. ● Made in the USA. For optimal performance, recommended to change at least every 3 months. ● The MERV 10 pleated filters offer improved performance for virtually every application. These filters achieve a MERV 10 rating per the ANSI/ASHRAE 52.2 Test Standard. These pleated filters incorporate media which is laminated to a galvanized metal that stabilizes the media during operation. The pleats are formed in a radial configuration to ensure proper dust-loading capacity. The standard pleated cartridge is bonded into a two-piece heavy-duty beverage board die-cut frame that creates a double-wall thickness around the filter. The die-cut grilles are internally bonded to the pleat apexes on both sides to ensure maximum integrity and support during the life of the filter. Pleated filters are used in a broad range of installations, from pre-filters to primary filters for homes, business, schools, apartments, hotels and industrial.