1. Power off and unplug the Air Purifier from the outlet.
2. Locate and remove the two screws from the back cover grill.

3. Remove the back cover grill and set aside.
4. Remove both the top right and top left bracket screws located on the purifier directly above the filter screen. This will release both filter bracket and the filter.

5. Pull the bracket off and remove the filter screen by pulling up and out. Discard old filter screen, but keep the bracket.
6. On the filter bracket is a plastic lip which anchors the original filter in place. This plastic lip will fit over the cut out located on the HEPA filter's top frame.

7. Guide the bracket and filter down and in to the purifier making sure the frame of the HEPA filter catches and depresses on the metal tab of the air purifier. Metal tab will be pressed on with the inside lip of the filter's frame and will not be visible anymore. The HEPA filter will protrude out roughly 2.5 inches.
8. Replace both the top right and top left bracket screws. This will seal the HEPA filter to the air purifier.

9. Replace the back cover grill and tighten the two back cover screws. Note: This will be a very snug fit.

10. Plug in Air Purifier and power it on.