Filtrete 14-in W x 18-in L x 1-in MERV 5 Basic Pleated Air Filter in the Air Filters department at Lowes.com
BNX TruFilter 16x25x1 Air Filter MERV 13 (4-Pack) - MADE IN USA - Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Allergies, Pollen, Mold, Bacteria, Smoke, Allergen, MPR 1900 FPR 10 - Amazon.com
Filtrete 14-in W x 18-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com