A two-stage condensing economizer designed for 100 to 800 hp boilers offers 94 percent efficiency, says the manufacturer. Exclusive technology allows the C2X-HE to provide maximum heat recovery. Efficiencies can be achieved depending on boiler firing rate, makeup or process flow and temperature. The first-stage economizer, made of 304 stainless steel tubes with aluminized steel-fin material, returns wasted heat to the boiler feedwater. Its second-stage condensing section, constructed of 304 stainless steel tubes with aluminum-fin material, preheats makeup or process water. It is suited for applications with a 50 to 100 percent makeup water requirement and process hot water applications such as food processing.