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Angelery Engineering Research Company (AERCO) is a leading supplier of boilers and water heating products, and the originator of semi-instantaneous water heating. For 55 years, AERCO has set the pace of change in commercial heating by offering boilers and water heaters which simplify plant infrastructure, reduce project costs and minimize lifecycle expenses for value-driven schools, hospitals and others seeking long-lasting, reliable, high-efficiency equipment with advanced building integration and control capabilities.