Window films offer several energy saving benefits that contribute to lower operating costs, especially in buildings with a large window to wall ratio.  By lowering the solar heat gain coefficient, reducing HVAC  and lighting imbalances, and in some cases improving heat retention, window film can be a significant part of a building sustainability plan.

For individual buildings,  window film professionals can help predict energy savings using the IWFA energy analysis program, Efilm which is based on the Department of Energy, Energy + platform.  Energy savings can then be used to calculate cost savings which help building owners and managers justify and ultimately help pay for the project.

Solar Heat Gain Reduction

Window films control Solar Heat Gain Coefficient (SHGC) by selectively filtering sunlight that passes though windows. SHGC measures the amount of solar heat admitted through a window. Window films adjust this coefficient by reflecting, absorbing, or transmitting solar energy. These improvements often lead to lower building operating costs. By effectively managing SHGC, window films may help regulate indoor temperatures, lessen reliance on mechanical cooling systems, and enhance energy efficiency.

Heat Retention

Some window films lower the emissivity value of windows thus improving the insulating properties of the glass surface. These films provide winter energy savings as well as summer cooling savings. Home window films provide insulation properties, which help to retain heat inside a building during colder months. By reducing heat transfer through windows, these films can improve the overall thermal efficiency of a home or commercial property. This means less reliance on heating systems and lower energy bills during the winter.

Energy Efficiency and Sustainability

Overall, the energy control benefits of window films contribute to improve energy efficiency and sustainability. By helping to reduce the demand for heating, cooling, and artificial lighting, window films help lower energy consumption, decrease greenhouse gas emissions, and lessen the environmental impact of buildings. These improvements align with efforts to achieve energy efficiency and sustainability goals and may help achieve LEED certification.