These aftermarket return grille filters are designed to let you upgrade to a thicker, higher-capacity filter without changing your existing return frame. A raised header around the edge allows a 4-inch filter to seat securely in standard 1-inch return grille openings, improving airflow efficiency and filtration in one simple swap.

These aftermarket return grille filters are designed to let you upgrade to a thicker, higher-capacity filter without changing your existing return frame. A raised header around the edge allows a 4-inch filter to seat securely in standard 1-inch return grille openings, improving airflow efficiency and filtration in one simple swap.

Designed for polarized-media electronic air cleaners, these filters use an activated-carbon center screen to help capture airborne contaminants and reduce household odors.

Designed for polarized-media electronic air cleaners, these filters use an activated-carbon center screen to help capture airborne contaminants and reduce household odors.

Accumulair air filters are designed to help trap dust, pollen, and other airborne particles so your home feels fresher and more comfortable. The moisture-resistant filter media helps discourage mold and bacteria growth, while a durable, recyclable metal backing provides long-lasting support and reliable performance.

Accumulair air filters are designed to help trap dust, pollen, and other airborne particles so your home feels fresher and more comfortable. The moisture-resistant filter media helps discourage mold and bacteria growth, while a durable, recyclable metal backing provides long-lasting support and reliable performance.

MERV ratings are a simple way to measure how effectively an air filter captures airborne particles. Rated on a scale from 1 to 20, higher MERV numbers indicate greater ability to trap dust, pollen, and other common contaminants, helping you choose the right level of filtration for your home and air quality needs.

MERV ratings are a simple way to measure how effectively an air filter captures airborne particles. Rated on a scale from 1 to 20, higher MERV numbers indicate greater ability to trap dust, pollen, and other common contaminants, helping you choose the right level of filtration for your home and air quality needs.