Rinnai Corporation manufactures tankless gas water heaters, kitchen appliances, and heating and air conditioning units for both commercial and residential use. Rinnai America Corporation, a subsidiary of Rinnai Corporation, is headquartered in Peachtree City, Georgia. Rinnai employs over 9,500 men and women worldwide and had sales of approximately $3 billion in 2017.
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Rinnai was founded in 1920 by Hidejiro Naito and Kanekichi Hayashi, who started out manufacturing and selling pressurized oil cooking stoves. In the 1930s, they expanded into gas appliances, with cooking stoves, ranges, space heaters, and water heaters, and the company has been in the hot water business since 1964. In 1974 the company established Rinnai America Corporation in Los Angeles, California with products including spa heaters and home heating solutions. In 2001, Rinnai America moved to its present location in Peachtree City, Georgia.
Rinnai introduced its line of hybrid tank-tankless water heater, which can replenish its hot water supply more than twice as quickly as a 40-gallon traditional storage tank type water heater, in 2013. Rinnai reintroduced their vent-free fan convector in 2014. All of their eligible products are Energy Star certified, and in 2014 all of their boilers received the Energy Star Most Efficient rating.
Rinnai provides a residential water heater warranty of 10 or 12 years on the heat exchanger (depending on model), 5 years on parts, and 1 year for labor. The warranty for the hybrid 10-year heat exchanger, 6-year tank, 3-year parts, and 1-year labor. An extended labor coverage warranty is available of select models. Registration within 30 days is required for the extended coverage.