10 Best Furnace Filters 2025 in the United States

The Filterbuy 16x25x1 Air Filter MERV 8 Dust Defense is a solid choice for general home use in furnaces, air conditioners, and HVAC systems. Its actual size of 15.5 x 24.5 x 0.75 inches fits standard filter slots well. With a MERV 8 rating, it effectively captures common airborne irritants like mold spores, pollen, and dust, filtering about 90% of dust particles. This level is good for improving indoor air quality without restricting airflow, which is important for efficient system operation.

The Filtrete 16x20x1 AC Furnace Air Filter is designed to efficiently capture unwanted particles, making it a solid choice for residential use. With a MERV rating of 5, it effectively attracts larger particles like lint and household dust, enhancing air quality. One of its standout features is the 3M technology that allows for better airflow while trapping these particles, leading to improved heating and cooling system performance. The filters come in a convenient 6-pack, which is great for those who prefer to stock up and change filters every three months.

The Filterbuy 16x25x4 Dust Defense air filter is a solid choice for homeowners looking to improve their indoor air quality. It fits furnaces and HVAC systems requiring a 16x25x4 sized filter, though its actual size is slightly smaller (around 15.5 x 24.5 x 3.6 inches), so it is important to measure your filter slot carefully to ensure compatibility. With a MERV 8 rating, it effectively captures common particles like pollen, mold, and about 90% of dust while maintaining good airflow to keep your system running efficiently.