1) NG/CNG/PNG/LNG Generator 2) ISO9001:2008, CE 3)Environmental friendly CHP 4)Low ... (Combined Cooling, Heating and Power) /Tri-generation: available on request. 3. The hertz and voltages: 50hz, 400/ ... 230vac or 60hz, 220/110vac, other voltages available on request.4. The fuels: (1) pipeline natural gas ... and Certifications: ISO 9001, ISO 8528, ISO 3046, CE, UL, CSA, EPA. 15. Factory test: all ...