Polberg® introduces the Rooftop Packaged Category including a wide range of units, Tropical & Non-tropical, 50Hz & 60Hz, and supports R410A & R22 refrigerant types. Polberg® Rooftop Packaged units shall be factory assembled, internally wired, fully charged refrigerant and 100% run tested to check cooling and heating operation, fan and blower rotation, and control sequence before leaving the factory. Wiring internal to the unit shall be colored and numbered for simplified identification. The unit is provided with an integral weather resistant control panel. Polberg's® rooftop packaged air conditioners are designed and manufactured to meet the requirements of severe climatic conditions and are built specifically for outdoor installations, either on ground or roof level. The units are available from 3 to 100 tons.