We offer five options in the 14 x 25 x 1" furnace filter size: MERV 4, MERV 8, MERV 11, MERV 13 and a washable MERV 5.

The reusable MERV 5 filter is interchangeable with one-inch disposable filters. It features a patented stage loading/ peak and valley design. The filter uses stage loading; each stage catches progressively smaller particles within the filter. Unlike other air filters, this filter doesn't use foam that can restrict air flow and doesn't have metal parts that could lead to corrosion or oxidation within the filter.

Another option in this size is the Fiberglass MERV 4 Panel Filter, which comes in a 12-pack and lasts about one month.

The MERV 8 Pleated Filter comes in a six-pack and lasts three months. Excellent for high-velocity equipment, this affordable filter is great for helping reduce airborne allergens. It's more than 30 times more efficient at capturing micro particles than ordinary fiberglass filters.

Our MERV 11 Pleated Filter catches more particles like dust and dirt than standard panel type HVAC filters. The filter lasts up to four times as long as standard panel type filters and extends the life of more expensive secondary filters.

The MERV 13 Pleated Filter features electrostatically charged filter media that captures airborne allergens smaller than one micron. It's quite effective in reducing airborne allergens like bacteria and won't support the development of mold, mildew, bacteria or other microorganisms.