inside furnace: 12.5meter( pipe length ).width inside furnace: 1.2 meters.height of pipes inside furnace: 1.2 meres.temperature: 850 degrees.fuel : dual fuel( natural gas and diesel). the burners must be dualuse. sometimes use natural gas, and sometimes use diesel.equipped with PLC, heat recovery, motor driven car ( trolley) goingin and out on trail.able to do heat treatment on heating graphs , topquality brand and accessories .