MAKE YOUR HOME YOUR SANCTUARY: MPR 1550 + MERV 12 AC Furnace Air Filter helps capture 50% of small particles from the air passing through it. (1) COOLING SEASON READY: Keep your home cool and your air cleaner with a Filtrete AC filter (Compared to MERV minimum filter requirements) EXCLUSIVE TECHNOLOGY: Designed with exclusive Filtrete 3-in-1 technology to pull in and trap unwanted particles, allowing cleaner air to flow through CERTIFIED: This furnace filter is CERTIFIED asthma and allergy-friendly (2) and helps capture dust, lint and other allergens in your household air CHANGE YOUR FILTER OFTEN: For optimal performance, make sure to change your 4-inch filter at least once every 12 months SMART APP: Use the Filtrete Smart App (iOS or Android) to set 90-, 180- or 365-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