Replaces: HFT600 Series, HEV-600 Series: HEV615, HEV615B, HEV615W, HEV620, HEV620B, HEV620W, HEV-615, HEV-615B, HEV-615W, HEV-620, HEV-620B, HEV-620W. Compare to part # HFT600T & HFT600PDQ. Did you know that the cost of all disposable filters is much more than that of the humidifier itself over its life span?.
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