"This Hamilton Home Products evaporator pad is designed to work specifically with the HHP Whole House Humidifier Item# 172914. Includes qty. 1 Evaporator pad, Dimensions L x W x H in. 2 x 10 x 10, Compatible With HHP house humidifier, Product Type Evaporator pads. Pad enclosed in plastic frame that ensures water flows through proper path for evaporation Pads should be changed once per heating season, or more often in hard water areas"
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