Description
The GeneralAire 12500 is the correct replacement for the following humidifier:
GeneralAire 1099 Flow Through Bypass Humidifier
GeneralAire 570 Bypass Humidifier
GeneralAire SL-16 Streamline Bypass Humidifier
The GeneralAire 12500 Humidifier Air Pressure Switch is also known as part number 7021 for the 1099 Bypass Humidifier. This air pressure proving switch prevents operation of the humidifier if there is no air flow in the duct, and helps to prevent moisture build-up in the duct system. On furnaces with a 2-speed blower motor or when wiring within your furnace is not practical, the GeneralAire 1099 Humidifier and the air pressure switch may be wired from a continuous 115-volt power source.
General Aire 12500 Air Pressure Switch Replacement
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