Which percentage of a commercial building's energy costs are lighting and HVAC responsible for, according...

According to the U.S. Department of Energy, lighting and HVAC (Heating, Ventilation, and Air Conditioning) systems are responsible for approximately57%of a commercial building's total energy costs. These two systems are the primary energy consumers in commercial buildings due to their continuous operation in maintaining comfort and lighting in large spaces. HVAC systems, in particular, consume substantial energy for heating, cooling, and air distribution, while lighting systems are significant because of the large number of fixtures and extensive operating hours.

Energy efficiency measures, such as switching to LED lighting, implementing occupancy-based controls, and upgrading HVAC systems to more energy-efficient models, are common strategies to reduce energy consumption and lower operating costs in commercial buildings.

Environmental Sustainability References:

U.S. Department of Energy. (2021).Energy Efficiency Trends in Commercial Buildings.

Energy Star. (2020).Commercial Building Energy Consumption Survey.

American Council for an Energy-Efficient Economy (ACEEE). (2020).Reducing Energy Use in Commercial Buildings.