Tips for food service owners and managers
Check door gaskets and auto closers to make sure they are in good condition. Warm, humid air can enter refrigeration compartments if these are not working properly, resulting in energy waste and spoiled food.- Make sure the refrigeration system is clean and dust-free, especially the coils. This can help improve heat transfer within the system.
- Make sure the refrigeration system has enough space around it to ensure good airflow over the heat exchange coils. This helps lower the amount of wasted energy.
More here http://energy.gov/eere/articles/6-energy-saving-tips-commercial-refrigerators-and-freezers
