4 Pack of Glasfloss ZL 14x24x1 MERV 10 Air Filters for AC and Furnace. ● Actual Size: 13-1/2 x 23-1/2 x 7/8 | Nominal Size: 14x24x1 ● Filtration Rating: MERV 10. Comparable to MPR rating 600 to 800, or FPR rating 5 to 6. ● Made in the USA. Ideal for residential and commercial use. ● The 1 inch Glasfloss MERV 10 pleated electrostatic air filter will enhance the air quality in your home or business. The Glasfloss Z-Line Series pleated filters offer improved performance for virtually every application. All Glasfloss Z-Line pleated filters feature fibers which do not absorb moisture. The Glasfloss Z-Line Series filters achieve a MERV 10 rating per the ANSI/ASHRAE 52.2 Test Standard. The Z-Line Series pleat is available in many standard face dimensions in 1”, 2" and 4" depths. Glasfloss Z-Line Series pleated filters incorporate media which is laminated to a galvanized metal that stabilizes the media during operation. Glasfloss Z-Line Series pleated filters are used in a broad range of installations, from pre-filters to primary filters for computer room units. Whether used as primary filters or as pre-filters in multi-stage systems, Glasfloss Z-Line Series pleated filters offer a solution for virtually every residential, commercial, and industrial HVAC application. Air filters are a simple and cost effective step towards a cleaner home and business environment by reducing existing particles. Air filters help keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor.