1. Turn the unit off.
   
   
2. Open the filter door, remove, and dispose of the old cartridge.
   
   
3. Slide the new filter cartridge in with the white side facing the rear of the unit. Do not remove the cardboard frame.
   
   
4. Close the filter door and turn unit on.
   
   
5. Change your air filter at least once per season or more often depending on air quality and use.
   
   

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