The Hamilton EP033 is the correct compatible replacement filter for the following humidifier models:
The Hamilton EPO33 Humidifier Water Pad Filter is a replacement humidifier filter for the Hamilton 2D model humidifier. This evaporator pad measures approximately 7" H x 5" ID x 6.5" OD x 0.75" thick and reduces mineral pollutants found in water resulting in both high performance and high output. Replace this water panel filter twice a season for the best results. This water pad does not feature netting around the filter.