Founded in Buffalo in 1946 by Charles Rittling, Zehnder Rittling manufactures commercial hydronic heating and cooling systems, including radiant ceiling solutions. Based in Western New York, the company combines an in-house engineering department with CAD design and custom-build capabilities, supporting architects, engineers and contractors on complex projects. Rittling has been part of the Zehnder Group since 2006 and is known in North America for hydronic terminal heating and cooling products.