4 Pack (Actual Depth: 3-3/4"). 16x20x4 MERV 13 Pleated AC Furnace Air Filters by Glasfloss Industries

100% Synthetic Media Pack Support Member, Galvanized Steel Pleat Support Grid, moisture-Repellent Adhesive, Double Wall Frame.. Industry applications: Pre-filtration for hospitals, general health care facilities, food processing plants, telecommunications, pharmaceutical and semi-conductor manufacturing, etc. No delaminating, no excessive buckling, no collapsing. The pleats hold together even when wet. The adhesive used to bond the frame and media pack into a unitized assembly is highly moisture repellent. liquid-Repellent Adhesive - Adheres Even When Wet. Our MERV 13 filters will not rack, warp or bend under normal handling or operating conditions. The expanded metal pleat support grid is made of galvanized steel for maximum rust resistance. Low initial resistance also helps to save on energy consumption A consistent pleat shape produces optimum performance, minimizes resistance, and improves dirt loading characteristics throughout the life of the filter. Heavy Duty Beverage Board Frame - Moisture-impervious, sturdy frame material stands up to rough handling, difficult service conditions, and long service life. Meets LEED Green Building criteria for minimum efficiency Protects from pollen, dirt, dust, pet dander and virus carriers, smoke, smog, lead dust, oil smoke, and micro allergens. MERV 13 Specifications: ASHRAE tested as required by LEED guidelines. Effectively captures and blocks small particles such as virus carriers, bacteria, allergens, smog, smoke, lint, dust, pet dander, and pollen. Comparable to MPR rating 1900 to 2200, or FPR 10 rating. Actual Size: 15-1/2 x 19-1/2 x 3-3/4 Nominal Size: 16x20x4 Filtration Rating: MERV 13