BNX TruFilter MERV 13 HVAC Air Filter 20x20x1 (Actual 19.68"x19.68"x0.75") 4-Pack — Electrostatic Media, Low Airflow Resistance

BNX TruFilter 20x20x1 is a high-efficiency MERV 13 HVAC filter designed to trap fine airborne particles while maintaining low airflow resistance.

Engineered and assembled in Houston, TX, this four-pack of BNX TruFilter filters delivers a compact, durable replacement for 20x20x1 furnace and air conditioner filter slots (actual size 19.68" x 19.68" x 0.75"). The filters use electrostatically charged media to attract and hold a wide range of particulates, and they are manufactured with a one-piece recycled cardboard frame that meets UL 900 standards. Comparable to MPR 1500–1900 and FPR 10 ratings, these filters balance filtration efficiency and airflow for everyday residential HVAC systems.

How does this filter improve indoor air quality?

The BNX TruFilter uses MERV 13-rated media with an electrostatic charge that captures more small particles than basic fiberglass filters. It reduces airborne dust, pet dander, pollen and many fine particles that circulate through forced-air systems, contributing to a cleaner living environment over weeks of use.

• Catches particles down to 3–10 microns with high efficiency.
• Electrostatic media increases particle adhesion without heavy airflow loss.
• Designed to work in standard home furnaces and air handlers.
• Noticeable reduction in visible dust within days of installation.

Will it fit my HVAC or furnace filter slot?

These BNX filters are nominally listed as 20x20x1 but the actual manufactured dimension is 19.68" x 19.68" x 0.75", which matches the common 20x20x1 replacement size used in many residential systems. Always confirm the physical dimensions required by your unit before installing.

• Actual size: 19 11/16" x 19 11/16" x 3/4" for accurate fit.
• Works in typical slots labeled 20x20x1 in furnaces and return grilles.
• Install with arrows indicating airflow direction toward the furnace or blower.
• Four filters provided for staggered replacement across seasons.

How long should each filter last and how does it affect airflow?

Service life varies with indoor particle load and runtime; many households replace filters every 1–3 months. BNX designed the media to offer strong capture rates while minimizing pressure drop, so normal system airflow should remain efficient when filters are changed at recommended intervals.

• Typical replacement interval: 1–3 months depending on usage and home conditions.
• Low airflow resistance helps preserve HVAC efficiency and comfort.
• Electrostatic charge boosts capture without needing very dense media.
• Replace sooner in homes with smokers, pets, or heavy dust sources.

What materials and certifications back the product?

BNX TruFilter is assembled at a registered U.S. facility using a single-piece recycled cardboard frame to reduce waste. The product is classified in accordance with UL 900 and manufactured under quality controls in an EPA-registered plant.

• Made in USA by BNX Converting, LLC in Houston, TX (EPA-registered facility).
• Frame constructed from recycled cardboard using single-sided frame technology.
• UL 900 classification confirms fire performance criteria for air filters.
• Comparable efficiency ratings: MPR 1500–1900 and FPR 10.

Who is this for: Homeowners and renters who want an affordable, American-made replacement filter that improves particulate capture without severely impacting airflow. It suits families with pets, allergy-prone occupants, or anyone seeking a step up from basic fiberglass filters for routine HVAC maintenance. If you need frequent high-efficiency filtration for specialized medical or industrial needs, consult a professional for system-compatible solutions.