For use with Holmes^® humidifiers: HM7204, HM7305, HM7305RC, HM7306, HM6000, HM6000RC, HM6600, HM6005HD, HM729, HM4600, HM4600HD, HM630, HM7203, HM7405, HM7808

For use with Bionaire^® humidifiers: BCM6000, BCM6010RC, BCM7203, BCM7203RC, BCM7305RC, BCM7305RCB, BCM7305, BCM645, BCM6610RC, BCM7204, BCM7207, BCM630, BCM646, BCM4600, BCM5520, BCM7204, BCM7204, BCM7305, BCM600, BCM4655, BCM5521, BCM655, BCM657, BCM658, BCM7205, BCM7255, BCM7307, BCM7308, BCM7309, BCM7510

Holmes humidifier filter part number HWF100 or HF235

Bionaire^® part number: BWF100, BWF100CS