Fits General Furnace Humidifier Models 709, 990, 1040, 1042, 1137, SL16 (990-13), Hamilton Model 10HF (EP036) and Williamson Power Model 500.Fits General Furnace Humidifier Models 709, 990, 1040, 1042, 1137, SL16 (990-13), Hamilton Model 10HF (EP036) and Williamson Power Model 500.
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