Which of the following is a key factor for ensuring energy efficiency in refrigerated open display cases?

Proper loading and temperature management in refrigerated open display cases play a crucial role in energy efficiency. When these cases are not loaded correctly, it can obstruct airflow, leading to uneven temperatures and higher energy consumption as the system works harder to maintain the desired temperature. Additionally, managing the temperature accurately ensures that the refrigeration system operates efficiently, reducing unnecessary energy usage.

In many commercial settings, well-managed loading allows for optimal air circulation while maintaining the temperature within acceptable limits. This not only enhances product visibility but also prevents excess energy expenditure that might occur when numerous items are jostling for space, creating hotspots or cold spots within the case.

While factors like regular cleaning of the coils, the use of energy-efficient bulbs, and the presence of fans can contribute to improving overall efficiency, they do not directly address the systematic approach to maintaining proper loading and temperature. Proper management is fundamental to ensuring that the entire system operates at peak efficiency, therefore significantly impacting energy usage and operational costs.