Whole house humidifier, manufactured by General. The Model 1000 Power Humidifier was designed with ease of service in mind. Installed on the warm air plenum of a forced air furnace, this model utilizes a flow through design that constantly flushes away trouble causing minerals not deposited on the replaceable water panel and provides exactly the right amount of moisture in vapor form. Comes with the digital E-2 control system. This system is so advanced it raises and lowers the humidity set point as the weather changes for optimum comfort.