• Water Wall Furnace with Suvega Tubes. • Largest Grate area to accommodate a wide variety of fuels. • High Efficiency as compared to internal fired "Marine" boilers. • Large Combustion area. • Three Pass Design, Low Stack temperatures. • Large water and steam space. • Suitable for a Variety of fuels such as Coal, Lignite, Wood, Groundnut Husk, Briquettes, Bagasse, Almond Shells.