Whole house humidifier, manufactured by Skuttle Corp. This model was designed with ease of service in mind. Installed on the supply or return duct of a forced air furnace, this model utilizes air flowing through the duct system to pick up moisture. Fan powered style needs no bypass duct. The flow through design constantly flushes away trouble causing minerals not deposited on the replaceable water panel and provides exactly the right amount of moisture in vapor form.