Boiler we used solid fuel like: the Waste of the industry/ coal/ Biomass, with the specification as follows: MODEL SB - SW : 300/ 500/ 750/ 1000/ 1250/ 1500/ 1750/ 2000/ 2500/ 3000/ 4000. CAPACITY ( KG/ H) : 500/ 800/ 1200/ 1600/ 2000/ 2400/ 2800/ 3200/ 4000/ 4800/ 6400. HEATING SURFACE ( M2) : 16/ 27/ 40/ 55/ 65/ 83/ 102/ 111/ 138/ 166/ 220. FUEL CONSUMPTION ( KG/ H) : 105/ 175/ 265/ 355/ 445/ 530/ 620/ 707/ 885/ 1060/ 1400. WOOD WASTE ( 16% DRY) WORKING PRESSURE : 10 BAR CONSTRUCTION : 3 PASS adapted by us to your requirement. When our explanation was more incomplete please contacted us. Telp: + 6221 - 88873495 / 082124173429