20x20x1 A/C Furnace Air Filter.  
Actual Size: 19-1/2 x 19-1/2 x 3/4.  
Filter Rating: MERV 8 | FPR 5| MPR 600.  

Our 20x20x1 MERV 8 Electrostatic Air Filter is convenient to use, easy to replace and excellent for most air filter conditions. The MERV 8 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 8 Description:
• Engineered and designed for high strength and rigidity
• Pleat consistency optimizes performance
• Defends from Lint, Dust, Pet Dander, Pollen, Dust Mites, & Mold
• Available several standard face sizes
• Independently tested and verified for quality control
• 100% synthetic, proprietary media resists moisture and damage
• Very low pressure drops and maximum dust holding capacity
• Heavy duty, moisture resistant beverage board frame
• Two-piece frame provides rigidity with double-wall thickness around outer edge
• Rust-resistant, expanded metal support grid made of galvanized steel
• 100% water repellent, high-strength adhesive coats entire interior of frame
• Recommended to replace at least every 90 days
• Manufactured in the USA