Proairtek AF20211M11SWH MERV 11 20x21x1 Air Filters (Pack of 4); Ideal for Anyone Wanting Clean, Crisp Air in Their Home; Offers Enhanced Airflow and Efficiency; High-performance Filtration

The Proairtek AF20211M11SWH is a high-efficiency HVAC air filter with a MERV 11 rating, designed to fit systems requiring a 20″ × 21″ × 1″ filter. It delivers enhanced indoor air quality by capturing a wider range of airborne particles such as dust, pollen, pet dander, and other common allergens while helping to maintain strong airflow and system efficiency. Built for homeowners who want clean, crisp air and reliable performance, this filter offers consistent, high-performance filtration for everyday use.

• ‌MERV 11 efficiency — captures a higher percentage of airborne particles and common allergens compared to lower MERV ratings, helping improve indoor air quality.
• Pleated synthetic media — increases surface area for efficient particle capture while supporting airflow through the system.
• Standard size: 20 × 21 × 1 inches — fits many residential HVAC systems, furnaces, and air conditioning units requiring this dimension.
• Durable frame and support — helps maintain shape and integrity during normal operation for reliable performance.
• Moisture-resistant media — designed to withstand typical home humidity conditions without compromising filtration.
• Easy drop-in installation — standard design makes replacing the filter quick and simple.