PETRA

commercial and industrial central air conditioning equipment, namely, air-cooled water chiller units and water-cooled water chiller units described as a direct expansion system consisting of a refrigerant, compressors, condensers, evaporators, fans and controls therefor, sold as a unit, for use in commercial buildings; rooftop air conditioning packaged units, namely, a single cabinet housing a direct expansion cooling system consisting of a refrigerant, compressors, evaporator coils, condenser coils, centrifugal and propeller fans, and controls therefor for use in commercial buildings, sold as a unit; air handling units for cooling which consist of centrifugal fans and coils for use in commercial buildings, sold as a unit