Advancing experiential design: A conversation with LEED Fellow Dr. Gail Brager

This story is about the direction of green building design, not a specific home upgrade, but it touches on ideas that affect how comfortable a house feels. The U.S. Green Building Council, which runs the LEED certification system for buildings, has brought on architecture researcher Dr. Gail Brager as its first senior fellow for occupant experience. Her work looks at indoor environmental quality, or IEQ, which covers things like lighting, temperature, and air quality indoors.

Brager's research challenges the idea that a home or building should hold one constant, neutral temperature. She argues that mild shifts in temperature and light, closer to natural daily rhythms, can improve alertness and even cut energy use. She points to simple, familiar comforts, like a warm cup of coffee on a cold day or a breeze from an open window, as examples of "thermal delight." Her research also supports an approach used in building standards called the adaptive comfort model, which found that when people have more connection to outdoor conditions, through open windows or shades they can adjust themselves, they often prefer some variation rather than constant climate control.

For homeowners, the practical takeaway is less about rebates and more about perspective: features like operable windows, natural light, and views of the outdoors are not just nice extras. They can support comfort and lower energy use at the same time. These ideas are being built into the newest version of LEED, the rating system used mainly for commercial and large residential buildings, as it evolves to value spaces people genuinely enjoy, not just ones that avoid discomfort.