As energy crisis become increasingly noticeable, the energy consumption has become the mainrnproblem which restricts the sustainable development of industry. The recovery and utilization ofrndifferent kinds of waste heat can effectively reduce energy consumption of the company.rnTherefore, recovery and utilization of waste heat become very important. Energy saving is one ofrnthe crucial concern, not only from the point of view of fuel consumption but also for thernconservation and protection of global environment. So, it is important that a significant andrngreat effort should be made for conserving energy from waste heat. Recovering and reusing thisrnwaste heat would provide an attractive opportunity for less costly energy resource. Most industryrnuse furnace to melt metals and metal scraps for manufacturing spare parts, by doing this theyrncan reduce cost of buying spare parts for the machine. rnHowever, during combustion process of furnace oil enormous amount of heat energy is wasted tornthe environment via chimney which is embedded in the flue gas. The furnace workingrntemperature is about 1400Â°C.Based on the measured parameters such as the averagerntemperature of flue gas at the hood and chimney was about 240Â°C and 146Â°C respectively. Fromrnheat transfer analysis calculation, the amount of waste heat obtained from hot flue gas wasrnabout 24.4kw, Hence, the amount of heat is recovered from the flue gas is about 37.6%. rnThis study aims at providing a flue gas as an alternative energy to dry the mold in the rnfoundry shop instead of drying by burning of wood. In this study temperature and velocity ofrnflue gas at different locations were measured and analytical calculation was made on flue gasrnsupply system and mold drying room. Simulation has been done using Computational FluidrnDynamics (CFD) Ansys software to show what is going on inside the hot flue gas supply ductrnand mold drying room. Tapping hot flue gas from top part of the furnace or chimney andrnsupplying via duct to drying room to dry the mold will benefit the industry-; by reducing fuelrnconsumption, saving the cost of the wood by 90%, making economical and environmentalrnfriendly. This will reduce impact of deforestation and create good working environment.