Rinnai Corp. engages in the development, manufacture, and sale of comprehensive heating products. The company is headquartered in Nagoya, Aichi-Ken and currently employs 10,908 full-time employees. The products and components are manufactured by the company and affiliated companies. In the domestic market, the Company sells directly to customers such as city gas companies, propane fuel sales companies, housing equipment manufacturers, house manufacturers, pipe building material sales companies. The firm manufactures and sells at overseas subsidiaries and affiliates. The firm operates in six businesses, including Japan, the United States, Australia, China, Korea, and Indonesia.