Rooftop Packaged Unit Suntree Rooftop Packaged Unit is single packaged which are factory assembled, tested and shipped completely with ... 5000~70000 m3/h airflow.function: air supply, cooling, heating, humidifying, air-purifying and others are integrated in a ... . Optional:Economizer with fresh, return air dampers with cowlwater heating coilMetal or plastic mesh on condenser coilsupply / return air ...