Duststop 2-Pack Premium MERV 8 Air Filter - 16-in x 20-in x 1-in - Electrostatic Pleated. Why settle for a standard air filter when you can buy a premium one? Duststop's Premium MERV 8 air filter is a high-quality product that captures all kinds of nasty particles, such as pet dander, pollen, smoke, dust mites, debris, and mould spores. This electrostatic furnace filter comes in a pack of 2 and each one will last between 30 and 90 days, so you don't have to worry about changing your filter all the time. Moreover, this pleated air filter offers increased efficiency over regular fibreglass filters. It'll help you breathe better.