This audit considered a number of opportunities to reduce heating energy consumption in a prawn farm with irrigation and ventilation improvements already implemented. The case study highlights energy savings of 6.5% in the site total energy consumption, corresponding to 12% of hatchery energy use, by covering heated hatchery tanks and heat recovery systems with an average payback or around 3.5 years, annual saving of almost $9,500 and emission reductions of 62.9 t CO2-e per year.