What is the difference between operational energy and embodied energy in LEED?

The distinction lies in the definitions and concepts surrounding energy in the context of a building's lifecycle. Operational energy pertains to the energy used by a building during its operational phase—essentially, this is the energy consumed for heating, cooling, lighting, and powering appliances throughout the building's use. This energy usage directly impacts the building's ongoing energy efficiency and is a critical focus area for LEED certification, as it relates to the building's performance during its operational life.

Conversely, embodied energy encompasses the total energy consumed in the production of a building's materials, including the extraction, manufacturing, transportation, and installation processes of those materials. This energy is invested before the building even begins its operational life and is essential for understanding the full environmental impact of a building, especially in discussions surrounding sustainable design and construction.

Understanding the difference between these two forms of energy is crucial for achieving energy efficiency goals set by LEED frameworks, as strategies can vary significantly based on whether the focus is on minimizing operational energy use or reducing the embodied energy in building materials.