high efficiency, over 90%, two passes steam boilers with low NOx emission for steam production from 500 to 5000 kg/h and pressuried hot water from 200,000 to 3,000,000 kcal. Max working pressure up to 22 bar. - vertical or horizontal execution - Highest safety in working condition - simple manangement - strong construction and long reliability - fully automatization - Minimum space requirement - maximum efficiency