11-1/4x26x4 Exact Filters Pleated MERV 10 (6 pack)

Exact Filters® produces this 11-1/4 x 26 x 4″ filter to your measurements, so instead of trimming, taping, or forcing a "close enough" size into place, you drop in a filter that fits your 11-1/4 x 26 x 4″ slot the first time. A custom-cut filter keeps every cubic foot of return air flowing through the media rather than around it, which is the foundation of any effective filtration setup. A MERV 10 rating is the most common mid-efficiency specification and the one most HVAC manufacturers print in their owner's manuals as the recommended minimum for standard systems. It captures everyday dust, pollen, pet dander, and mold spores while keeping airflow resistance moderate — a sensible balance for buildings without specific air-quality concerns. Specifications Nominal size: 11-1/4 x 26 x 4″ Actual dimensions: 11-1/4 x 26 x 3-3/4″ Efficiency rating: MERV 10 Quantity: 6 filters per carton Common applications for a 11-1/4 x 26 x 4″ custom filter include retrofit installations, legacy HVAC systems installed before standard sizes were codified, built-in return grilles that were framed to non-standard dimensions, and commercial unit housings that don't match any current off-the-shelf size. Features Replace approximately every 90 days in standard installations; shorter intervals in high-dust, smoky, or heavy-use environments Suitable for forced-air furnaces, central AC, heat pumps, and packaged HVAC systems Sold as a 6-pack so you have a full year of replacements on hand Cardboard frame with reinforced media for structural stability during handling and installation