• Establish a management information system on loading, efficiency, and specific fuel consumption.
• Prevent infiltration of air, using doors or air curtains.
• Monitor O2/CO2/CO ratios and control excess air level.
• Improve burner design, combustion control, and instrumentation Ensure that the furnace combustion chamber is under slight positive pressure.
• Use ceramic fiber linings in the case of batch operations Match the load to the furnace capacity.
• Retrofit with heat recovery devices Investigate cycle times and avoid extended hours of runtime and excess heating.
• Provide temperature controllers. Ensure that the flame does not touch the stock. Repair damaged insulation.
• Recover maximum heat from flue gases. Ensure upkeep of heating surfaces by regular cleaning.
• Use an infrared gun to check for hot wall areas during hot weather.
• Ensure that all insulated surfaces are clad with aluminum lining.
• Insulate all flanges, valves, and couplings

References

Bureau of Energy Efficiency, 2010 Guidebook for National Certification Examination for Energy Managers and Energy Auditors: Book 2

Asian Productivity Organization, 2010 Training Manual on Energy Efficiency for Small and Medium Enterprises

Nepal Energy Efficiency Programme, 2012-2016, Investment Grade Energy Audits