Rinnai Corporation is a Japan-based manufacturer of gas appliances and heating solutions, trading in the United States as an over-the-counter equity under the symbol RINIY. Headquartered in Nagoya, Japan, Rinnai designs, produces and markets a range of residential and commercial products that utilize gas as their primary fuel source.
Founded in 1920 in Nagoya, Rinnai has built a century-long reputation for innovation in combustion and heat transfer technology. Early developments included gas-fired boilers and heaters, which laid the groundwork for later advances in condensing and energy-efficient systems. The company has since diversified its offerings to meet evolving global standards for energy conservation and emissions control.
Rinnai’s product portfolio features tankless water heaters, space and floor-standing heaters, gas ranges, cooking appliances and commercial kitchen equipment. Its tankless water heaters are recognized for on-demand performance, compact design and lower standby energy loss compared to traditional tank models. The commercial division supplies custom-configured heating and kitchen solutions to hospitality, food service and industrial sectors.
With manufacturing facilities in Japan, North America and Asia, and distribution through subsidiaries and authorized dealers, Rinnai serves markets across Asia-Pacific, North America, Europe and Australia. The company is guided by an executive leadership team and board of directors, emphasizing research and development, quality control and customer support to maintain its global market position.
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