As of 2015, Harsco Industrial Patterson-Kelley manufactures condensing boilers, non-condensing boilers and dual-fuel boilers, which use natural gas or propane to provide heat or hot water without interruption. The boilers offer high efficiency and fit through standard commercial hallways and doorways, reducing installation costs.
Harsco Industrial Patterson-Kelley condensing boilers can be used in condensing, non-condensing and combination systems, and can reduce fuel bills by up to 80 percent. The non-condensing boilers, built with a copper heat exchanger, are suitable for retrofit or replacement projects, or systems needing higher temperature water all or most of the time. Dual-fuel boilers are suitable for facilities that may need backup fuel service, such as hospitals and schools.