20x25x1 AC Furnace Air Filter MERV 10 | Actual Size: 19-1/2 x 24-1/2 x 7/8 Our MERV 10 rated electrostatic air filter is convenient to use, easy to replace and excellent for most air filter conditions. The MERV 10 HVAC air filter is designed to protect heating and cooling equipment from most airborne particles. The filter also removes microscopic particles that can contaminate your home, stain walls and furnishings, and aggravate seasonal allergies. MERV 10 Specifications: Protects from Lint, Dust, Pet Dander, Pollen, Dust Mites, Smog, and Mold Independently tested and verified for quality control 100% synthetic, proprietary media resists moisture and damage Extremely low pressure drop and high dust holding capacity Heavy duty, moisture resistant beverage board frame Two-piece frame provides rigidity with double-wall thickness around outer edge 4” models use die-cut finger separators to stabilize each pleat Rust-resistant, expanded metal support grid made of galvanized steel 100% water repellent, high-strength adhesive coats entire interior of frame Pleat consistency maximizes performance Engineered and designed for high strength and rigidity Recommended to replace at least every 90 days Made in the USA Filtration Rating Definitions: MERV = Minimum Efficiency Reporting Value. This is the industry standard rating used by ASHRAE, American Society of Heating, Refrigerating, and Air Conditioning Engineers. MPR = Micro-Particle Performance Rating. FPR = Filter Performance Rating. We will Support You: If an issue arises, you have our promise that we’ll help and make it easy. We have a 100% customer satisfaction policy and Free Return Shipping. We understand that our service does not end when you click “buy”, and we are determined to be known as the company with the friendliest and best service possible.