An 850,000-square-foot office tower in Changsha City, China, has reduced energy consumption by 28 percent and earned two green HVAC building certifications.

The Northstar Delta Office Tower is among the first in the region to be awarded two green-building certifications including the U.S. Green Building Council’s Leadership in Energy and Environmental Design certification and the Green Building Evaluation Label, a program managed by the Chinese government that evaluates projects to make sure they conform to standards set for green building.

“We turned to Johnson Controls because of its expertise and long-term leadership in building solutions and green certification,” said Min Zhang, deputy general manager and chief architect of the Northstar Delta Office Tower. “The company was able to give us advice on the right building technology and lead us on the path to certification.”

Johnson Controls’ recommendations included an innovative heat-recovery system to harness waste heat. This is especially prevalent in China, where building construction continues to rise as air quality continues to worsen. 

Other energy-saving HVAC construction features in the Northstar Delta Office Tower included Johnson Controls’ Metasys building management system and a variable-air-volume system that officials say is the first used in a high-rise building in Hunan province.

 “Building management has shown real leadership in its efforts to develop a facility that saves energy while reducing carbon pollution,” said Siew-Hooi Ling, director of service and energy solutions for Johnson Controls’ China office.  “This was an excellent project for us because we are committed to supporting efficiency and sustainability in buildings and facilities around the world.”