Edwin Ruud

Norwegian-American mechanical engineer and inventor

Edwin Ruud (9 June 1854 – 9 December 1932) was a Norwegian-American mechanical engineer and inventor who immigrated to the United States where he designed, sold, and popularized the tankless water heater. He was the founder and President of Ruud Manufacturing Company, now a division of Rheem Manufacturing Company.²

From Wikipedia’s article on Edwin Ruud (this version), CC BY-SA 4.0.

Born Jun 9, 1854, died Dec 9, 1932.¹