Product review (5 stars): Filter Last Through a Few Months
Bought the humidifier at Costco, but they didn't sell extra filters. The humidifier is amazing, can humidify a whole floor of a large home. Found this filter and bought 2! It already is lasting for over 2 months. To extend the filter longer, empty the humidifier every week, wipe the bottom. Fresh water helps keep the filter clean and fresh.