Product review (5 stars): Great product to keep my humidifier in top condition
Works as expected.  I have had my Bionaire humidifier for about 15 years now and cannot say enough about the durability of the unit and capability to humidify my entire house (open floor plan).  The 2x3 gallon reservoirs mean ev other day or so filling to keep my 2-level condo comfortable for all.  The replacement filters are critical to keep the unit operational and this filter really traps particulates (including  my long-hair cat hairs) and preserving the use of the unit.  I return to buy more every year and do not regret the purchase.