C.I. Group Public Company Limited, established in 1983 and headquartered in Pathum Thani, Thailand, specializes in the production and global distribution of air conditioning and refrigeration products. Their extensive range includes various heat exchanger coils, such as D-Coat, 5MM, aluminum, condenser, water, evaporator, and tube-in-tube types. They also offer a diverse selection of units, including heavy-duty air purifiers, air handling units, air-cooled condensers, condensing units, unit coolers, and chillers. Beyond HVAC equipment, the company provides comprehensive building envelope solutions. These offerings feature KingZip zipped roofing systems, K-Dek, foilback systems (which include gutters, safety features, and light solutions), BENCHMARK and Kingspan insulated products, architectural wall panels, and cold storage systems. Furthermore, C.I. Group develops ARII smart solutions, a software platform designed for managing energy and environmental meters, as well as applications for cold rooms. Their service portfolio extends beyond manufacturing to encompass coil replacement, air handling unit (AHU) renovation, mechanical & electrical (M&E) design, and the complete design and installation of cold room/store and smart solutions, complemented by maintenance and inspection services for their air conditioning and refrigeration lines. C.I. Group has also diversified into numerous other ventures. These include locomotive construction and maintenance, the development and building of electricity production and distribution networks, and manufacturing and distributing medical equipment (such as rubber gloves) alongside water supply systems. They are also involved in solar power generation, hotel operations, and providing water supply for industrial use. The company actively exports its various products and solutions worldwide.