Harsco Industrial Patterson-Kelley, a trusted industry pioneer for over 125 years, manufactures and sells a full-line of condensing, non-condensing and hybrid hot water boiler systems, as well as semi-instantaneous and instantaneous water heaters. Harsco Industrial Patterson-Kelley offers a wide array of commercial boiler products including both outdoor boilers and gas fired boilers. Harsco Industrial, Patterson-Kelley also provides the P-K Blend Master laboratory blender as well as parts, service, upgrades, and ongoing technical support for existing P-K Process Equipment.