Filtrete Allergen Defense Air Filter, 1000 MPR, 9824-4, 14 in x 30 in x1 in
CREATE A CHANGE COUNTDOWN in the Filtrete™ Smart app. When the lifespan is up, you’ll get a notification to change your filter. Material and Composition. A dirty filter will slow down air flow and make the system work harder to keep you warm or cool--wasting energy.