50TC17-30 WeatherMaker® Single Packaged Rooftop Cooling Only Vertical Air Flow Unit with Puron® (R-410A) Refrigerant, 15 to 27.5 Nominal Tons 50TC17-30 WeatherMaker® Single Packaged Rooftop Cooling Only Vertical Air Flow Unit with Puron® (R-410A) Refrigerant, 15 to 27.5 Nominal Tons