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NOTE: Before operating air cleaner, record date of installation on HEPA filter so you can replace it annually. To remove and replace HEPA filter, see the "Filter Replacement" section. Using the Controls Power On/Off 1. Plug into a grounded 3 prong outlet. 2. Press POWER ON/OFF to start the air cleaner. 3. Press FAN SPEED to select desired speed. 4. Press POWER ON/OFF to stop the air cleaner. Sleep Press SLEEP/LOCK to set the fan speed to Low for 8 hours. The air cleaner will then return to the p