<p>High Capacity Pleated Furnace Filters are MERV 8 rated according to ASHRAE 52.2 standards and available in 1-inch, 2-inch, and 4-inch depths. The electrostatically charged, 100 percent synthetic, graduated density media is continuously bonded to a 30-gauge galvanized, corrosion-resistant, expanded metal support grid with an effective open area of 96 percent. The media is resistant to a wide range of chemicals, does not absorb moisture, and will not support microbial growth.</p> <p>&nbsp;</p> <p>The controlled pleat spacing maximizes surface area and dust-holding capacity and is bonded to the enclosure frame to prevent dust bypass. The enclosure frame is constructed of high wet-strength, moisture-resistant beverage board. The diagonal support members of the frame are bonded to the entering and exiting apexes of each pleat to prevent pleat collapse and filter bowing while preventing air bypass and providing rigidity.</p> <p>&nbsp;</p> <p>1-inch depth filters: 18 pleats per linear foot; 2-inch depth filters: 12 pleats per linear foot; 4-inch depth filters: 11 pleats per linear foot</p> <p>&nbsp;</p> <p><strong>Furnace Filters are an economical alternative if you are looking for a quality filter without paying a premium price. These high-quality filters are available in a variety of sizes and are a cost-effective upgrade from simple fiberglass filters.</strong></p>