Whirlpool DS201NB Operating Instructions Manual page 47

Air Purifying
System
Rear Panel (Pre-filter)
The pre-filter (Nano Silver) is under the cover at rear panel.
2. Ionizer
Uses high voltage to ionize (electric charge) air molecules, such that the air molecules becomes
positive or negative charges. Ionizer is used to remove particles in the air. For Ionizer
operation, please refer to P.42.
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