3M Filtrete Micro-Allergen Reduction Furnace Filter - 16-in x 25-in x 1-in. This Filtrete air filter from 3M will provide up to 90 days of filtration for your central heating and cooling unit. It's more efficient than fibreglass, washable, and non-electrostatic pleated 1-inch filters and measures 16 in x 25 in x 1 in. Plus, thanks to its electrostatic technology, it skilfully traps microparticles like pet dander, smoke, and household dust. This product is also effective at capturing large particles such as pollen and lint. In fact, it's designed to promote the health of your home's occupants by keeping an optimal airflow. This product carries the American Lung Association Health House logo and has an MPR rating of 1000.