During the AHR Expo, John Siegenthaler and Caleffi surprised Bob “Hot Rod” Rohr with a copy and dedication of his new book.
Hot Rod has been a plumbing, radiant heat and solar contractor and installer for 30 years and has pushed the envelope of design and function for all in the area of renewable energy and the technical design of said systems. Bob currently heads up the training and education division of Caleffi both at and away from their US office in Milwaukee, WI.
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