When the Wrigley Building – consisting of the two iconic Michigan Avenue towers – was sold to buyers led by BDT Capital Partners, significant capital investments to infrastructure and architectural upgrades were made to the office towers and ground floor retail space to increase the building’s value and appeal to new tenants.
The lower levels of the building were experiencing negative air pressure. During the winter months especially, air was being drawn into the building creating drafts, cold spots, and inefficiencies in the building systems. Variable frequency drives (VFDs) were installed on the supply and exhaust fans, and in conjunction with the new BAS, the lobby air ventilation can be better controlled and kept at a slightly positive pressure.
The transformation of the building’s lower level offices into retail spaces required a redesign of many of the building systems. The original building systems would require the entire building to operate in order for the retail space to be supported after-hours. To allow the retail space to operate independently, a smaller chiller was installed and several fan rooms were added.
Other components of the redevelopment included installation of fire protection sprinklers, an enhanced telecommunications distribution, upgraded electrical distribution, and new domestic water pumping systems. ESD’s consultants also assisted with the selection of the building’s new double pane windows to replace the single pane windows installed during a 1980s renovation. Afterwards, our energy modeling demonstrated enough energy savings to procure energy rebates.
In 2014, the Wrigley Building Redevelopment project received a Chicago Building Congress Merit Award for Rehab Construction.