Green Circle Decarbonize Technology Limited, through its subsidiary, engages in the design, development, and manufacturing of energy saving solutions. The company specializes in phase change material (“PCM”) thermal energy storage (“TES”) technology. It offers thermal energy storage technology for use in heating and cooling applications, and power generation; phase change material that offers temporary storage of excess thermal energy for use in heating, ventilation, air conditioning, and refrigeration applications; and BocaPCM-TES Panel, a high density polyethylene plastic encapsulated container for use in heating, ventilation, and air conditioning and refrigeration applications. It also provides BocaPCM-TES tanks and systems, and automatic control systems. The company was founded in 1992 and is based in Kwun Tong, Hong Kong. Green Circle Decarbonize Technology Limited is a subsidiary of Joyful Star Limited.