The Tier1 DPFS20x25x6 is a 5-inch media air filter with actual dimensions of 19.88" x 24.75" x 4.38" (nominal 20x25x6). It carries a MERV 11 rating, meaning it captures 65–85% of airborne particles between 1–3 microns, including dust mites, mold spores, pet dander, and pollen. This 2-pack is designed as a direct replacement for Lennox X0585, Honeywell FC100A1037, and similar whole-house filtration cabinets.

The Tier1 DPFS20x25x6 is engineered for long-lasting performance and typically lasts 6 to 12 months, depending on indoor air quality, pet presence, and HVAC runtime. Unlike 1-inch filters that require monthly changes, the deep-pleated 5-inch design offers significantly more surface area, allowing it to hold more debris while maintaining optimal airflow throughout its service life.

This filter is a compatible replacement for Lennox X0585, Honeywell FC100A1037, Carrier FILXXCAR0020, Bryant, Day & Night, and most whole-house media air cleaner cabinets that accept a 20x25x5 or 20x25x6 filter. Always verify your cabinet's actual opening dimensions before installation to ensure a proper seal and prevent air bypass.

The Tier1 DPFS20x25x6 uses a high-capacity synthetic pleated media with an electrostatically charged design that attracts and traps microscopic particles. The rigid beverage-board frame prevents bowing or collapse inside the cabinet, and the deep V-pleats maximize dust-holding capacity while keeping static pressure low, which protects your HVAC blower motor from strain.

Install the Tier1 DPFS20x25x6 with the arrow printed on the filter frame pointing toward the furnace or air handler — this indicates the direction of airflow. The pleated side typically faces the return air duct (incoming air). Installing the filter backwards reduces efficiency and can cause the pleats to collapse, so always double-check the airflow arrow before sliding the filter into the cabinet.