The narrow floor plate optimizes daylight penetration, reducing electric light energy from ambient dimming fluorescent ballasts. Individuals can control their task lights and glare control, as well as underfloor ventilation diffusers. The atrium serves as a return air pathway, with heat recovery at the air handlers. Users are provided views to the exterior as well as the landscaped central atrium.

 

Solar control was inadequate for some occupants on the northern perimeter. Fritted transparent overhead glazing created periodic visual issues. Additionally, the project team did not specify office furniture, which does not allow occupants to turn from sources of glare. Interior shades were installed to improve comfort. Mechanical and lighting control strategies were honed over the M&V period and drastically reduced energy use and improved visual and thermal comfort.

 

IT plug loads are still the most difficult to control. A strong "Green Team" initiative includes representatives from all occupant groups and focuses on sustainable practices and building operations. The GSA provides a comprehensive education and orientation program for the USACE employees new to the building. The project is one of three Federal Buildings that is participating in a lighting research project to quantitatively determine the effects of light on human health and well-being.