[18x18x2 | 4 Pack | 2   Filter]

Box of 4 of Glasfloss ZL 20x25x4 MERV 10 Pleated 4" Inch Air Filters for AC and Furnace. ● Exact 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 rating 5 to 6. ● Air Flow is comparable to a MERV 8 with improved filtration. Made in the USA. Ideal for residential and commercial use. ● Note: Does not replace 5" inch or 4-3/8" Depth filters. Please check actual filter size needed. ● Regularly replacing your filters will keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor. When your HVAC unit runs properly, it consumes less energy and requires less maintenance. The Glasfloss MERV 10 pleated electrostatic air filter will enhance the air quality in your home or business. All Glasfloss Z-Line pleated filters feature fibers which do not absorb moisture. The 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. Our pleated filters incorporate media which is laminated to a galvanized metal that stabilizes the media during operation. 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 and prevents air bypass. The die-cut grilles are internally bonded to the pleat apexes on the air-entry and air-exit sides to ensure maximum integrity and support during the life of the filter. 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.