Sustainable Facilities Tool U.S. General Services Administration

Whole Building Systems Thinking

Unlike conventional design processes, where components and disciplines are treated separately, sustainable design requires an evaluation of whole systems. When retrofitting an office, consider the space as a whole. This means thinking not only about the lighting, the flooring, the windows, the HVAC system, and the furniture as separate components, but also thinking about the relationship between each of these components and the ways that those relationships create the space, and how that fits with sustainability goals.

Check out the Whole Building Systems section in Explore for information on building systems, their relationship to one another, and the integrated design team necessary to reach sustainability goals.

For example, if a project’s goal is to save energy from lighting and improve occupant comfort, it should think not only about the type of lighting fixtures needed, but also how the space will be used by the occupants, the amount of sunlight streaming through the windows at different times of year, how that light gets bounced into the space, how the light levels are controlled, and even the colors of the walls. By thinking holistically about the lighting system, rather than simply about the lighting components, a more comfortable, efficient, healthy and productive space can be created. In addition, the project “system” is nested within larger systems, such as a watershed, an air shed, a forest, a neighborhood and city, and so forth; these larger systems should also be considered.