How do I set up and install the filters for the first time?

Ensure the unit is powered off and unplugged, then remove the grille cover by grasping the recess in the top center and pulling forward. Remove the round filter cartridge, take off the protective plastic wrap, wrap the Pre-Filter around the HEPA Filter cartridge, secure it with the fasteners provided, and reinsert the cartridge with the plastic ring at the top and the tab facing out. Replace the grille cover by placing the tabs on the bottom into the slots and gently pushing the top until secure. (Page 5)