#1 Recommended Brand (Filtrete Brand is the most recommended brand of HVAC Air Filters based on the US Filtrete Brand Health Tracker, Ipsos, June 2022)The higher the MPR, the more microparticles - such as pollen, pet dander and smoke - your filter will capture from the air passing through itCHANGE FILTER AT LEAST EVERY 90 DAYS for optimal performance of your heating & cooling system or HVAC systemA dirty filter will slow down air flow and make the system work harder to keep you warm or cool -- wasting energy. Sign-up for a filter change reminder program (www.filtrete.com/ChangeReminders) that works for you!OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. air filters for your furnace, air conditioner or HVAC systemDESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow throughATTRACTS AND CAPTURES large particles such as lint, household dust and dust mite debrisMPR 300 has a rating of MERV 5CREATE A CHANGE COUNTDOWN in the Filtrete Smart app. Simply use the app to scan the barcode on your filter’s packaging, then choose 30, 60 or 90 days for your replacement countdown. When the lifespan is up, you’ll get a notification to change your filterFOR RESIDENTIAL use only