Boost your home s energy efficiency with the AAF Flanders NaturalAire Cut-To-Fit Air Filter. Proper HVAC maintenance can extend the life of your unit reduce energy costs improve air quality in your home and keep your system functioning optimally. The NaturalAire filter is a reliable choice for furnaces as well as central air units especially those with hard-to-find and specialty filter sizes. The material is virtually effortless to cut with heavy shears or a razor knife so that you can create the dimensions to suit your specific needs then just slide it into place. This AAF Flanders furnace filter offers a simple one-size-fits-most option. A springy almost rigid structure requires no frame for support. The natural fibers will even stand up to washing and reusing multiple times offering an efficient cost-saving option for conscientious consumers. This cut-to-fit filter measures 1 thick to trap allergens and other particles from entering your system and it fits up to 20” by 30” spaces. It features two times the dust holding capacity compared with polyester filters. This MERV 1 filter is designed to last up to one full year and is shipped in new condition.