Holmes HF221 Humidifier Wick Filter
This item is discontinued. Click here to see other Holmes Replacement Humidifier Filters.
Fits Holmes models HM3500, HM3600, HM3640, HM3650, HM3655.
Humidifier filters should be replaced at the start of the season of use and about every two to four weeks depending on usage and water hardness. Always remove the filter when cleaning your humidifier.
