The Filtrete 14x20x1 AC Furnace Air Filter is a high-quality, MERV 5 rated filter designed specifically for furnaces. Made by the trusted brand Filtrete, this flat panel filter is designed to effectively capture airborne particles and improve indoor air quality. With a 6 pack included, this filter is an essential component for maintaining a clean and healthy heating and cooling system in your home. Trust in Filtrete to provide reliable filtration for your furnace. MAKE YOUR HOME YOUR SANCTUARY: 6-pack of 3-month pleated Filtrete 14x20x1 MPR 300 AC Furnace Air Filter helps capture unwanted particles from your household air to contribute to a cleaner, fresher home environment DIFFERENT FROM NOMINAL SIZE: Slightly different from the nominal size, this air filter?s exact dimensions are 13.81 x 19.81 x 0.81 EXCLUSIVE TECHNOLOGY: Designed with exclusive Filtrete 3-in-1 technology to pull in and trap unwanted particles, allowing cleaner air to flow through COUNTLESS PARTICLES: With a 300 MPR and MERV 5 rating, your Filtrete Filter will help capture many particles from the air passing through it VERSATILE USES: Works for changing the air filters in your furnace, air conditioner/heating system or HVAC system CHANGE YOUR FILTER OFTEN: For optimal performance, make sure to change your filter at least once every 90 days SMART APP: Use the Filtrete Smart App (iOS or Android) to set 30-, 60- or 90-day reminders to change your air filter MOST TRUSTED: Filtrete Brand is North America?s most trusted brand of HVAC Filters, based on 2024 Sago US Brand Health Survey of Residential HVAC Air Filters