BNX TruFilter 20x22x1 MERV 13 Air Filter 4-Pack - Electrostatic

Our review of the BNX TruFilter 20x22x1 MERV 13 (4-Pack) finds it best suited for homeowners who want noticeably cleaner indoor air without sacrificing airflow. The single biggest reason to buy is the filter media: an electrostatically charged, MERV 13-rated pleat that captures microscopic particles while maintaining low resistance, so furnaces and HVAC systems do not work harder. Installation is straightforward and the sustainable, double-sided cardboard frame adds practical rigidity, making this a solid replacement option for allergy-prone households and those with pets.

Key Features

• MERV 13 electrostatic media: Captures a high percentage of microscopic particles such as pollen, mold, bacteria and smoke while preserving airflow.
• Actual size accuracy: Sells as 20x22x1 with an actual size of 19 11/16 x 21 11/16 x 3/4, so it fits common HVAC and furnace slots without modification.
• Low air flow resistance: Designed to meet ASHRAE 52.2-2017 initial efficiency/resistance guidelines so heating and cooling systems maintain performance.
• Sustainable frame: Double-sided two-piece cardboard frame made from recycled material adds rigidity and reduces waste compared with flimsy single-piece frames.
• Made in USA: Manufactured in Houston, TX at a registered facility, offering traceable domestic production and compliance with UL 900 classification.
• Comparable ratings: Works as a comparable option to MPR 1500-1900 and FPR 10 filters for those tracking filter rating systems.

Who It's For

This filter is ideal for homeowners with allergies, pets, or routine exposure to pollen and smoke who need a step up from basic fiberglass filters. It suits standard residential HVAC and furnace systems that accept 20x22x1 filters and where maintaining airflow is important.

It is less appropriate for systems requiring thicker or specialty HEPA-style cartridges, or for users who need official medical-grade filtration for clinical settings. Buyers wanting a filter thinner or thicker than 1 in should look for alternate sizes.

Pros & Cons

Pros

• High-efficiency electrostatic media captures very small particles including pollen, dust mites and some bacteria.
• Low resistance design preserves HVAC performance while improving indoor air quality.
• Easy to install and fits typical 20x22x1 slots with accurate actual dimensions.
• Made in the USA with a sustainable recycled cardboard frame and UL classification for safety.

Cons

• Only available as a 1 in depth, so not suitable where thicker filters are required for tighter sealing or higher capacity filtration.
• Cardboard frame, while rigid and recycled, may be less durable in very damp environments compared with plastic frames.

Specifications

Product Size	20x22x1 (actual 19 11/16 x 21 11/16 x 3/4)
MERV Rating	MERV 13
Pack Quantity	4-Pack
Media Type	Electrostatically charged pleated filter media
Comparable Ratings	MPR 1500-1900, FPR 10
Origin	Made in USA (Houston, TX)
Safety/Class	Classified to UL 900

Our Verdict

The BNX TruFilter 20x22x1 MERV 13 4-pack is a practical, well-made upgrade from basic fiberglass filters for most homes, delivering measurable reduction in dust, pollen and smoke without hurting airflow. It is good value for allergy-prone households and pet owners who want cleaner air on a regular replacement schedule, though those needing thicker or medical-grade filtration should consider other options.

Frequently Asked Questions

Will this filter fit my furnace slot?
These are sold as 20x22x1 with an actual size of 19 11/16 x 21 11/16 x 3/4, so they fit standard 20x22x1 slots that accept typical pleated filters.

How soon will I notice cleaner air?
Users typically report noticeably cleaner air and reduced dust within about 48 hours of installation thanks to the electrostatic MERV 13 media.

Is the frame durable?
The double-sided recycled cardboard two-piece frame provides good rigidity for normal indoor use, but plastic-framed filters may be more suitable in consistently damp environments.