As a company, DPR Construction has a deep-seated commitment to sustainability, its employees, and the communities it serves. A couple of years ago, when the lease for its Phoenix office came up, the firm seized the opportunity to create an ultra-green environment for its 101-person Phoenix office and field staff.
Working with A/E firm SmithGroupJJR, DPR converted a vacant 16,533-sf one-time “adult-themed boutique” in the city’s reemerging Discovery Triangle into a LEED-NC Platinum office, one that is on target to be the first net-zero commercial office building in Arizona.
The Building Team—including sustainability consultant DNV KEMA and consulting structural engineer PK Associates—forged numerous paths to energy reduction. They used an 87-foot zinc-clad solar chimney to create a convection current that draws air into the building through four evaporative cooling “shower towers” equipped with internal misters and showerheads. The pre-cooled air then flows through the open office space, and hot air exhausts back through the chimney.
PROJECT SUMMARY
DPR CONSTRUCTION, PHOENIX REGIONAL OFFICE
Phoenix, Ariz.Building Team
Submitting firm: SmithGroupJJR (architect/MEP engineer), in conjunction with DPR Construction (owner/developer/GC)
Structural engineer: PK Associates Consulting Structural Engineers
Sustainability consultant: DNV KEMA Energy & SustainabilityGeneral Information
Size: 16,533 sf
Construction cost: $3,762,000
Construction time: February 2011 to October 2011
Delivery method: Design-build
Twelve eight-foot-diameter fans, three oversized roll-up doors, and 87 operable windows installed along the east and north façades further support the building’s passive cooling system. Eighty-two solar optical tubes bring additional daylight into the workspace, helping to cut artificial lighting by 70%.
LEDs provide exterior site lighting, but the team decided against using LEDs on the interior because they did not meet the project goal of a maximum 10-year return on investment. A phantom-load reduction “vampire” switch cuts off 90% of plug loads at night.
The tally: Net energy use intensity was cut to 28.85 kBtu/sf/year; lighting power density was reduced to 0.96 watts/sf. Net-zero energy was achieved through the installation of a 79.6 kW PV-covered canopy over half the parking lot.
To further its commitment to the community, DPR has opened its building to host meetings for local business groups, students, and nonprofit organizations. +
Related Stories
| May 25, 2011
Low Impact Development: Managing Stormwater Runoff
Earn 1.0 AIA/CES HSW/SD learning units by studying this article and successfully passing the online exam.
| May 25, 2011
Register today for BD+C’s June 8th webinar on restoration and reconstruction projects
Based on new and award-winning building projects, this webinar presents our “expert faculty” to examine the key issues affecting project owners, designers and contractors in case studies ranging from gut renovations and adaptive reuses to restorations and retrofits.
| May 25, 2011
Hotel offers water beds on a grand scale
A semi-submerged resort hotel is the newest project from Giancarlo Zema, a Rome-based architect known for his organic maritime designs. The hotel spans one kilometer and has both land and sea portions.
| May 25, 2011
Smithsonian building $45 million green lab
Thanks to a $45 million federal appropriation to the Smithsonian Institution, the Smithsonian Environmental Research Center in Edgewater, Md., has broken ground on what is expected to be one of the most energy-efficient laboratories in the country. The 69,000-sf lab is targeting LEED Gold and is expected to use 37% less energy and emit 37% less carbon dioxide than a similar building.
| May 25, 2011
World’s tallest building now available in smaller size
Emaar Properties teamed up with LEGO to create a miniature version of the Burj Khalifa as part of the LEGO Architecture series. Currently, the LEGO Burj Khalifa is available only in Dubai, but come June 1, 2011, it will be available worldwide.