The GeneralAire 7500 is the correct replacement steam nozzle for the following humidifier models:
The GeneralAire 20-1 Humidifier Steam Nozzle is a replacement steam nozzle for GeneralAire Elite Steam Humidifier Models DS15, DS35, RS15, and RS35. The 20-1 steam nozzle, also known as the 7500, is typically mounted on the side of your humidifier's duct. Steam is then injected into the duct work and the existing air handler blows the steam into the conditioned space. This humidifier nozzle is a genuine GeneralAire replacement part and is manufactured with quality materials.
GeneralAire 20-1 Humidifier Steam Nozzle specifications: