ENERGY STAR vs LEED: Do you know the difference?
Both Energy Star and LEED are aimed at energy efficient ways to construct buildings with minor impact to the environment. In concept they both focus on design and operation but there are many complex differences between the two programs. As we face the daily impacts of climate change, these programs steadily gain popularity, but do you know the difference?
ENERGY STAR certification for buildings
ENERGY STAR is a joint program between the EPA and the Department of Energy (DOE). The program aims to help consumers and industries save money and protect the environment by using energy-efficient products and practices. The program was first developed for rating and labeling computers, now there are more than thirty categories, including residential and commercial buildings. Certification by ENERGY STAR requires a building to meet strict energy performance standards set by the EPA. The building must earn a score of seventy-five or higher on the scale (1-100) indicating that it is a top performer. The ENERGY STAR scale is based on the measured energy use of a building and is calculated within the program’s Portfolio Manager tool. The score is compared against similar buildings nationwide. The score considers both the physical attributes and operations of people within.
LEED certification
Leadership in Energy and Environmental Design, commonly called LEED, was developed by the U.S. Green Building Council (USGBC). LEED certified building aims to save money, improve efficiency, create healthier indoor spaces, and lower carbon emissions. LEED certification requires a project to earn points by following prerequisites and credits on several parameters set out by USGBC that tackle carbon, energy, water, waste, transportation, materials, and indoor air quality. The project is then verified by an independent third party. Points are awarded and rating falls into one of four distinct levels:
- Certified (40-49 points)
- Silver (50-59 points)
- Gold (60-79 points)
- Platinum (80+ points)
What is the difference?
The most significant difference between both programs is that LEED is a design-based certification that promotes sustainable building practices for both new and existing buildings. ENERGY STAR is performance based and is awarded to the top twenty-five percent (remember they must score over seventy-five on the scale) of buildings in its class. While ENERGY STAR measures performance it does not require specific design criteria for building. The certification is based on the actual or projected energy use (in comparison to similar buildings). LEED, however, does not measure the building’s actual performance but does require specific engineering design. LEED also targets other areas that do not fall within the scope of ENERGY STAR certification such as indoor environmental health. Because of the difference in their approach to certification cost-benefits would depend on the individual project.
How do they work together?
Almost half of LEED points are based on Energy Star criteria. Some of the prerequisites required under the LEED program also relate to the performance for appliances which includes those rated as ENERGY STAR. Both programs complement each other. Even their differences are complementary, with LEED focusing on the design aspect and ENERGY STAR focusing on the output of a building. When considered in tandem they can provide a holistic approach to green building. For example, you can use ENERGY STAR appliances to help achieve LEED certification. You can also use ENERGY STAR’s Portfolio Manager to calculate energy performance for a LEED certified building.
Key to remember: Energy Star and LEED certifications are different in their approach, but they are complementary and can provide a holistic approach to green building.