Compare to Part # WF2. This is NOT a Vicks, Kaz, Enviracaire or ReliOn OEM product. The Vicks, Kaz, Enviracaire and ReliOn brand names and logos are the registered trademarks of their respective owners. Any use of the Vicks, Kaz, Enviracaire and ReliOn brand names or model designations for this product are made solely for purposes of demonstrating compatibility.