21x23.5x5 NOMINAL: The actual size of this replacement filter is 23.2" x 20.1" x 5". MERV 11 RATING: With an efficiency of 85% or better, these filters are usually the best option for residential homes & light commercial applications that require slightly increased filtration of particles, such as those with pets CAPTURES PARTICLES: Breathe easier in your home as our filter clears the air of dust, lint, hair, debris and other indoor impurities. AFFORDABLE QUALITY: SpiroPure air filters are sold in packs to save you even more without cutting corners on material quality, efficiency, or filtration performance. MADE IN USA: Our pleated furnace filters are Made in the USA and offer a high quality replacement air filter option for your air conditioner and/or furnace unit without the high cost.

Find a value pack of high quality replacement MERV 11 furnace filters from SpiroPure. SpiroPure pleated AC & Furnace filters are made in the USA and are the perfect choice for most standard residential and light commercial air conditioner and furnace units. Please measure your existing air filter before ordering to ensure that this size will be compatible with your AC & furnace system.

We recommend replacing your furnace filter every 3 to 4 months for maximum efficiency and cooling and heating system life.