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ENERGY STAR Labeled Building Profile

Chicago Transit Authority - 567 W Lake Street
567 W. Lake Street
Chicago, IL 60661
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The Chicago Transit Authority (CTA) building contains 400,000 square feet and houses the main offices of the Chicago Transit Authority, a governmental agency that operates the nation's second largest public transportation system. The building was completed and occupied in 2004, and it received Leadership in Energy and Environmental Design (LEED) certification in 2007.

 

The building was designed and developed with leading edge technology and high-efficiency mechanical systems. The HVAC system has building automated systems integration to coordinate and optimize the performance of various mechanical components--chillers, boilers, cooling towers, and air-handling units. The fan-powered mixing boxes have direct digital control and utilize hydronic coils, which provide more robust and economical heating. The commissioning carried out for LEED certification verified that all building systems were functioning and in accordance with specifications.

 

Building lighting utilizes T-8 lamps, compact fluorescent bulbs (CFLs), and dimming ballasts. Lighting in private offices is controlled by occupancy sensors.  During LEED certification, the building received two credit points for day-lighting as 89 percent of office space receives natural light. Because of that high daylight factor, a plan for perimeter lighting control is currently under evaluation. 
 

The building has other environmental design features including a "green roof" that covers 91 percent of its top surface. This system provides thermal insulation, reduces urban heat island effect, and retains storm water runoff.  Windows are made from low emissivity glass and are equipped with horizontal blinds for solar control. A policy implemented during the summer requires that blinds be kept in a lowered and tilted position to reduce building heat load. 
 

During the comprehensive commissioning that was performed for LEED certification, Transwestern engineers discovered that the air flow sensors in the main fan system were not capable of maintaining a proper balance between supply and return air volumes. Replacement of the existing Pitot tube differential pressure sensors was recommended, and electronic air flow measuring stations were subsequently installed. Building engineers performed the installation to minimize the cost of the upgrade.

 

Variable frequency drives (VFDs) are installed on one of the two chillers, one of the two cooling towers, and on the chilled water and condenser water pumps. To improve energy efficiency and duty-cycling, installation of a VFD on the second chiller has also been recommended. 

 

Other environmental features of the building include low-flow plumbing fixtures and a bicycle storage facility with locker rooms and showers to encourage alternative commuting. Environmental practices include programs for comprehensive recycling, green cleaning, indoor air quality control, and low-impact pest control.

Communications:


CTA Headquarters received the ENERGY STAR for superior energy performance in 2005, 2006, 2007, and 2008. The ENERGY STAR provided the impetus to pursue LEED certification, and in May 2007, the building achieved Gold LEED-EB certification. It was the first in the state of Illinois to receive the award as an existing building.

Testimonial:

Unavailable


Please note: Narrative information in this profile has been provided by Chicago Transit Authority or a representative of this facility. Other building information was verified and submitted to EPA at the time of application. Building energy performance, operating characteristics, and ownership/management may be subject to change over time.

Building Owner:*
Chicago Transit Authority

Property Manager:*
Transwestern

Year(s) Labeled (Rating):
2005 (83)
2006 (87)
2007 (91)
2008 (92)
2009 (91)
2010 (91)
2011 (85)
2012 (86)
2013 (87)

Facility Type: Office

Total Floorspace: 428096 sf

Year Constructed: 2004

Contract Type: None
Financing Type: Internal Capital

Technologies Used:
   Stage 1-Recommissioning
   Stage 2-Lighting
   Stage 3-Load Reductions
   Stage 4-Fan Systems
   Stage 5-Heating and Cooling Plant
   Other Technologies/Strategies

For More Info:
Jim Runnion
General Manager
Chicago, IL 60661
312-6812032
jim.runnion@transwestern.net