The Tier1 20x20x1 air filter is rated MERV 13, which provides high-efficiency filtration for residential HVAC systems. It captures airborne particles as small as 0.3 microns, including dust, pollen, pet dander, mold spores, smoke, smog, bacteria, and virus carriers. This 6-pack of pleated filters offers a balanced solution for improving indoor air quality without restricting airflow in most standard HVAC systems.

The nominal size is 20x20x1 inches, while the actual dimensions measure approximately 19.5 x 19.5 x 0.75 inches to ensure a proper fit in standard 20x20x1 filter slots. This sizing fits most residential furnaces, air handlers, and return air grilles designed for 1-inch filters. Always check your existing filter or unit specifications before ordering to confirm compatibility.

Tier1 recommends replacing this pleated air filter every 90 days under normal conditions. However, replacement frequency may vary based on household factors such as pets, allergies, smoking, or high dust levels, which can shorten filter life to 30–60 days. The 6-pack provides a full 18 months of filtration when changed on the standard quarterly schedule, making it a convenient, cost-effective supply.

This Tier1 air filter features electrostatically charged synthetic pleated media supported by a beverage board (paperboard) frame with a metal mesh backing for structural integrity. The pleated design increases surface area for better particle capture and extended service life. The beverage board frame is made from recyclable paperboard material, making it a more environmentally friendly option compared to plastic-framed filters.

The Tier1 20x20x1 MERV 13 filter is engineered with a low initial resistance pleated design to maintain strong airflow while delivering high-efficiency filtration. It is compatible with most residential HVAC systems designed to accept MERV 11–13 filters. If your system was designed for lower MERV ratings, monitor airflow and system performance after installation, and consult your HVAC manual or technician to confirm MERV 13 compatibility.