Rinnai Corp. engages in the development, manufacture, and sale of comprehensive heating products. It products include water heaters, kitchen appliances, air-conditioning appliances, commercial-use equipment and others. The firm operates through following geographical segments: Japan, America, Australia, China, South Korea, and Indonesia. The company was founded by Hidejiro Naito and Kanekichi Hayashi on September 1, 1920 and is headquartered in Nagoya, Japan.