KOLONGLOBAL Corp. engages in the provision of construction and trading services. It operates through the following business divisions: Construction, Trading, Automobile, Resting Facilities, and Others. The Construction division provides civil engineering, housing, environment, plant, oversea construction, and rental services. The Trading division offers construction materials, heavy chemicals, and steel products. The Automobile division provides car services. The Resting Facilities deals with high-way rest areas. The Others division offers sports complex and sports consulting services. The company was founded on December 28, 1960 and is headquartered in Gwacheon, South Korea.

QHeat is a provider of innovative geothermal energy solutions. QHeat’s technology is based on 2000 meters deep heat wells utilising geothermal heat. QHeat’s unique technology is suitable also for storing energy enabling equalization of seasonal energy fluctuation.

Greensleeves Inc also offers a varied orchid program from arrangements to fresh cut stems. Not only do plants enhance appearance's of both indoor and outdoor environments, they also purify the air.

Korea Institute of Energy Research is a government-funded research institute that develops energy technology.

EnLink continues to be an innovative leader in the geothermal heat pump (GHP) industry by virtue of its continuous improvement in the installation of underground loop systems, called Earth Heat Exchangers (EHXs). After 14 years in the business, and with 13 US and international patents to its credit, EnLink has a record of reliability and success in EHX installation that is unsurpassed in the industry. EnLink is committed to total professionalism with its clients, its partners and all the stakeholders who participate in their projects.

Est Co., Ltd., a subsidiary of M.H. Group Ltd., is a Japanese company located in Matsue-shi. The firm operates a real estate agency and video rental business. On July 30, 2002 Big Group Co., Ltd. acquired Est Co., Ltd.

Lotte Engineering & Construction Co., Ltd. provides construction and civil engineering services. Its business areas include housing, architecture, civil, plant, and overseas works. The company was founded on February 3, 1959 and is headquartered in Seoul, South Korea.

JFE Steel Corp. engages in the manufacture and sale of steel products. Its products include steel plates for ships and bridges, steel sheet for automobiles, home electrical appliances, and wall and roof construction, special steel, structural steel, stainless steel, steel rods for construction, and steel-pipe. The company was founded on April 1, 2003and is headquartered in Tokyo, Japan

Hunan Dadao New Energy Development Co., Ltd., established on 2018-06-07, Business scope includes heat production and supply;Development and Utilization of Geothermal Resources;Energy-saving technology promotion service;Engineering Management Services;electric,Installation of piping and equipment;Air conditioner sales and maintenance services;hardware,sales of steel;Landscaping engineering and municipal road engineering construction;River and lake governance and flood control facilities engineering construction.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Waterfurnace International, Inc. manufactures and distributes ground source/water source heat pumps. The company was founded in 1983 and is headquartered in Fort Wayne, IN.

We are a specialized manufacturer of commercial air conditioners, which is celebrating its 73rd year in business. We design, develop and produce air conditioners including control systems, and they are widely used in various sites such as office buildings, shopping malls, hotels and manufacturing factories. The air-conditioning industry is seriously working on global warming countermeasures against abnormal weather in recent years. We will make a small contribution with our technological capabilities, and will meet the demands of the times by developing new products and systems in cooperation with heat sources and building "optimal air conditioning for each field". In addition, we would like to focus on developing new technologies to meet the growing demand for "ventilation". We are still in the middle of the road, but we would like to make further social contributions based on the wisdom and sweat of all employees.

Jansen GmbH, a subsidiary of Jansen Holding AG, is a company headquartered in Dingelstadt, Germany. The firm manufactures and wholesales steel tubes. Elmar Gollers, Priska Manuela Jansen and Christoph Jansen are the current co-CEOs of the firm.