10 Best HEPA Air Conditioning Filters 2025 in the United States

The BNX TruFilter 20x20x1 air filter is a solid choice for those looking to improve indoor air quality with a high-performance filter. It has a MERV 13 rating, capturing up to 98% of tiny particles like pollen, mold, bacteria, smoke, and pet dander, making it especially useful for allergy sufferers or households wanting cleaner air. Its electrostatically charged pleated media enhances filtration without putting much strain on your HVAC system, thanks to its low airflow resistance.

The size is slightly under 20x20 inches, so it's important to check your unit’s filter slot compatibility. This product comes as a 6-pack, offering good value over time. The filters are made in the USA using sustainable materials and a one-piece frame designed to reduce environmental waste. One limitation is the filter thickness of 0.75 inches, which may not fit all HVAC systems that require a thicker filter.

While it performs well for many airborne particles, it isn't a true HEPA filter, which filters even smaller particles but usually restricts airflow more. This filter is a dependable, eco-friendly option for everyday home use where strong particle capture and airflow balance are both important.

The BNX TruFilter 20x20x1 MERV 13 air filters are a strong choice for anyone looking to improve indoor air quality in their home HVAC or furnace system. With a MERV 13 rating, these filters effectively capture up to 93% of tiny airborne particles such as pollen, mold, bacteria, smoke, pet dander, and even virus carriers, making them excellent for allergy sufferers and those wanting cleaner air. The filters use electrostatically charged pleated media that not only traps microscopic pollutants but also allows for low airflow resistance, meaning your heating or cooling system won’t have to work harder to push air through, helping maintain efficiency.

The actual filter size is close to the standard 20x20 inches, fitting common HVAC systems, though it is slightly thinner than 1 inch at about 0.75 inches, which is worth noting for compatibility. These filters are made sustainably in the USA with a single-piece frame that reduces waste, appealing to environmentally conscious buyers. The pack includes four filters, offering reasonable value and convenience for regular replacement.

Customer reviews are highly positive, praising both performance and build quality. A minor limitation is that while the filter excels at particle capture, it doesn’t specifically address odors or gases beyond basic smoke particles. For those seeking a reliable, high-performing filter to reduce allergens and improve air cleanliness without sacrificing airflow, the BNX TruFilter is a practical and well-regarded option.

The Filtrete 24x24x1 AC Furnace Air Filter is designed to improve indoor air quality by capturing a wide range of airborne particles. It carries a MERV 11 rating, which means it can trap medium-sized particles like dust, pollen, mold spores, and pet dander effectively, making it suitable for most residential HVAC systems. While it does not have a true HEPA rating, its MERV 11 rating balances filtration and airflow to help your heating or cooling system operate efficiently without being overly restrictive.

The filter size is slightly smaller than the nominal 24x24x1 inches at 23.81 x 23.81 x 0.81 inches, so it’s important to confirm compatibility with your specific furnace or air conditioner slot. Its pleated design with polypropylene material and electrostatic properties helps pull in and trap particles better than a basic flat filter. Replacement every three months is recommended to maintain good performance, and the product comes in a convenient 2-pack, with subscription options for regular deliveries to simplify upkeep.

This Filtrete filter is a reliable choice for improving home air quality by capturing common allergens and particles. It is easy to use, widely trusted, and offers good value with a two-pack, making it well suited for general household air cleaning rather than specialized medical-grade filtration needs.