The main energy consumption in barns is through heating, lighting, ventilation, and on-farm feed mills. An energy audit can identify where energy is being used, and develop options to reduce consumption (and cost). The 9 steps to perform an audit are define boundaries, compile documentation, do a walk through audit, a preliminary analysis, develop energy management opportunities, a diagnostic audit, make recommendations, implement changes, and continue to monitor and target energy use. An energy audit can be self-conducted or contracted out, and can provide significant savings. An audit can provide a benchmark, but an actual energy benchmarking audit can be performed and allow comparisons between producers. Some of the common energy saving options are to change to more efficient light bulbs, to insulate and seal drafts, change to dual or energy efficient fans, install a water cooling system, changing the heating system, and properly setting controls.