3 Pack of Glasfloss ZL 14x25x1 MERV 10 Air Filters for AC and Furnace. ● Actual Size: 13-1/2 x 24-1/2 x 7/8 | Nominal Size: 14x25x1 ● 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. 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 an improved home and business environment by reducing dust. Air filters help keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor.