The Tier1 16x25x4 air filter carries a MERV 13 rating, placing it among the higher-performance residential pleated filters available. At this rating, the filter captures airborne particles as small as 0.3 microns, including dust, pollen, pet dander, mold spores, smoke, smog, bacteria, and virus carriers. This makes it an excellent choice for households with allergy sufferers or anyone seeking improved indoor air quality without restricting HVAC airflow.

This Tier1 filter has actual dimensions of 15.5" x 24.5" x 3.75" (nominal size 16x25x4). It is designed to fit HVAC systems and air handlers that require a 16x25x4 filter, and is compatible with popular OEM models including Honeywell FC100A1029, Lennox X6670, Carrier FILCCCAR0022, Bryant, Payne, Day & Night, and similar 4-inch media cabinets. Always verify your system's required filter size before installation.

The Tier1 16x25x4 pleated air filter is rated for up to 3 months of service life under typical residential conditions. Homes with pets, smokers, high occupancy, or occupants with allergies may need to replace the filter every 60 days. This 6-pack provides an 18-month supply when changed quarterly, ensuring your HVAC system runs efficiently year-round.

The Tier1 16x25x4 filter is constructed with synthetic electrostatically charged pleated media supported by a beverage-board frame and an expanded metal backing for structural rigidity. The electrostatic charge attracts and traps fine particles that standard mechanical filters would miss, while the deep 4-inch pleat design maximizes surface area to reduce pressure drop and extend dust-holding capacity.

No, the Tier1 16x25x4 MERV 13 filter is engineered with a high-surface-area pleat design specifically to maintain proper airflow while delivering high-efficiency filtration. The 4-inch depth provides significantly lower pressure drop than 1-inch filters of comparable MERV rating, making it safe for most residential HVAC systems. However, always confirm your blower motor and system specifications can handle MERV 13 media before switching from a lower rating.