High Performing Buildings - Winter 2008 - (Page 8)

north-south orientation to maximize daylighting, the building has an arc footprint approximately 400 ft in length and 62 ft in width. The thin 62 ft width means that no part of the ﬂoor is more than 30 ft from a window. To further project light into the building, light shades were used on the south side. Optimizing the daylighting capabilities of the building considerably reduced the lighting heat load and the energy savings produced by the lighting systems. A dimming control system combined with T5 lamps supplements daylight with artiﬁcial light only as needed, so that artiﬁcial light is produced as efﬁciently as possible. Additionally, space occupancy sensors turn lights off when spaces are unoccupied. This further contributes to the facility’s energy savings. The lighting system produced the greatest single energy savings. In the ﬁnal energy analysis, lighting energy used was calculated to save 57.3% of the lighting energy required by the Standard 90.1 budget building. Raised Floor Air-Distribution System Heifer International desired the building to provide a ﬂexible work environment for employees. The design requirements included optimizing comfort, ﬂexibility and sustainability. A raised ﬂoor system was chosen because it met all three of these design requirements. Several different types of raised ﬂoor systems were evaluated, and a steel and concrete composite system was selected with an 18 in. clear space below the ﬂoor. Great care was taken during construction to minimize air leakage within the ﬂoor system. A variable air volume (VAV) airdistribution system was chosen because it is believed to be the most efﬁcient system for moving heat from the occupied space where it is produced to the air-handling unit that moves it to a place where it is unobjectionable. The narrow arc of the building allows daylight and outdoor views for every workstation. 8 HIGH PERFORMING BUILDINGS Winter 2008 Photo © Timothy Hursley

Table of Contents for the Digital Edition of High Performing Buildings - Winter 2008

High Performance Buildings - Winter 2008
Passing On the Gift: Heifer International Headquarters
Head of the Class: University of Florida’s Rinker Hall
How Far Can You Go? Pearl River Tower
The Proof Is Performance: How Does 4 Times Square Measure Up?
Lighting the Way: Two Guilford County Schools
Montreal’s Retail Example: Mountain Equipment Co-op® (MEC)

High Performing Buildings - Winter 2008