Most people – consumers and contractors alike – don’t give a great deal of thought to what goes into making an exceptional boiler. That’s where rAy Boiler comes in. rAy technology imbues each high-efficiency, fully condensing cast-iron boiler with all the features that give homeowners and professionals great performance and outstanding longevity. Just as important, the company matches its products’ cutting-edge capability with highly efficient heat cycling for optimum comfort. A product of Mestek, Inc. – a leader in commercial and residential HVAC technologies – rAy products warm customers better than anyone else.