Furnace filter options abound in the 20x25x1" size category. We sell filters that range from MERV 4 to MERV 13, as well as a washable filter that you can reuse.

The MERV 11 Pleated Filter captures and holds more pollen, dust and other particles than standard pads or panel type heating and cooling filters – giving your house a cleaner indoor air quality. The filter features 100% synthetic electrostatically charged thermally bonded fibers that don't have chemical binders. Its enclosure frames are moisture resistant beverage board.

Another option is the MERV 4 Fiberglass Panel Filter, which is engineered to be sturdy, affordable and easy to use. This filter is designed for general air filtration in light to medium dust conditions.

The MERV 8 Pleated Filter is excellent for high-velocity equipment. It is more than 30 times more efficient at capturing micro particles than commonplace fiberglass filters. This chemical-free filter lasts up to three months.

MERV 13 Pleated Filter features a 100% synthetic electrostatically charged surface for maximum efficiency at capturing micro particles. This three-month filter comes in a six-pack. It is effective in reducing airborne particles like pollen, mold spores and pet dander.

An appealing choice for the environmentally conscious homeowner is the Permanent Washable Filter that can be easily washed and reused. Built to last a lifetime, this filter has a MERV rating of 5 and comes with a full warranty.