10 S. Dearborn Map
Interior Space International
Exelon has moved into its new 10-floor, 220,000 sf headquarters space at Chase Tower. The project is targeting a LEED for Commercial Interiors Platinum certification, and is certain to acheive Gold status if Platinum isn't awarded. This is likely the largest green commercial interior space completed in Chicago and establishes Exelon's leadership among large corporations in Chicago - hopefully we'll see others following suit.
The space uses the typical 'green office' approach of open-office spaces located around the perimeter and glass-walled offices in the center of the floors, maintaining access to daylight and views for nearly all occupants. One has to wonder if the view becomes distracting from an upper floor of the tallest building in the loop, though! As a utility company, it's not surprising that energy efficiency is a focus here, with a respectable overall power density of 0.9 W/sf for lighting, including LED task lights. General lighting dims in response to daylight levels (measured by a sensor integral to the light fixture). All eligible equipment in the space is Energy Star rated.
Most interior wall partitions are constructed from the DIRTT moveable wall system, which greatly reduces the waste associated with "churn" when offices need to be reconfigured - the walls may simply be moved around. Similarly, rather than purchasing new furniture, significant cost and materials were saved by re-using furniture (in excellent condition) from Exelon's previous offices. If this seems obvious (do you buy new furniture when you move), you'd be surprised how often completely new furniture is purchased as part of an interior fit-out.
The project also includes a fitness center with showers - a boon to bicycle commuters, but also an expensive feature many employers won't provide. Exelon negotiated with the landload to provide green cleaning services, and there are numerous recycled-content and low-VOC products in the project.
Other design and construction team members included general contractor Turner Construction, MEP engineer ESD, LEED Consultant HJ Kessler Associates, acoustic consultant Talaske, lighting consultant Lighting Design Alliance, and structural engineer Thornton Thomasetti.