BNX MERV 13 Electrostatic Pleated Air Filter 20x20x4

This pleated electrostatic HVAC air filter from BNX combines MERV 13 efficiency with a dimension suited for many residential systems, helping reduce pollen, mold spores, smoke and other microscopic particles while maintaining low airflow resistance. It is intended for use in furnaces, air conditioners and whole-home HVAC systems where higher particle capture is needed, according to the manufacturer.

Key Points

This filter uses electrostatically charged media to capture a wide range of airborne contaminants while still allowing effective airflow. It is listed to the ASHRAE 52.2-2017 standard for initial efficiency and resistance. The construction aims to outperform basic fiberglass filters by capturing finer particles such as pet dander, smoke, and some bacteria carriers. Manufactured in the United States, the product comes from an EPA-registered facility in Houston, Texas, and carries a UL 900 classification.

Technical Specifications

• Name: BNX MERV 13 - Pleated Electrostatic Air Filter (2 pack)
• Size: 19 1/2 x 19 1/2 x 3 5/8 inches (marketed as 20 x 20 x 4 inches)
• Efficiency rating: MERV 13, comparable with MPR 1500-1900 and FPR 10
• Standards and approvals: EPA registered facility and UL 900 listed (certificate UL-US-2403701-0)
• Country of manufacture: United States

Advantages

The pleated media increases surface area for particle capture while the electrostatic charge enhances attraction of small particles. This combination means the filter can trap a higher percentage of microscopic particulates than many standard options, which helps reduce common indoor allergens. Additionally, because the filter is designed to maintain lower resistance to airflow, it can often be used without imposing excessive load on the HVAC blower motor, according to the manufacturer.

Usage Recommendations

Install the filter in the return-air side of the HVAC system following the flow direction arrow on the frame. Replace on a regular schedule based on household conditions, such as the presence of pets, smoke exposure or allergy sensitivity, since heavy particle loads will reduce effectiveness over time. Consider checking compatibility with your unit’s filter slot depth and airflow requirements before use, because high-efficiency filters may not be appropriate for every older system.

Note a possible limitation: while MERV 13 filters capture a broad range of particles, they are not a replacement for specialized medical-grade filtration or standalone air purifiers in environments requiring HEPA-level cleaning.