Technologies

Photo of a man kneeling on one knee and applying a white material to a black roof. Three other men are standing in the background with their backs to the camera.

Cool Roofs

Cool roofs are made of white or light-colored materials that better reflect sunlight than traditional dark-colored roofs, reducing interior temperature and energy used to cool buildings. Learn more.

The Building Technologies Program works to improve the energy efficiency of our nation's buildings through innovative new technologies and better building practices. On this page you'll find links to more information on the program's research and development activities in several technological areas, which are grouped here into the following broad categories:

Appliances
Building Envelope
- Walls, Roofs, and Foundations
- Windows and Doors
Geothermal Heat Pumps
Indoor Air Quality
Lighting
- Solid-State
- Spectrally Enhanced
Water Heating
Whole Building Design
- Advanced Controls
- Commissioning