- : Chicago, IL
- : Sterling Bay Ltd.
- : WMA Engineering
Three 150,000 cfm custom roof‐top air handlers for Google’s Chicago, IL Headquarters.
Nestled on “green roofs” all three Ingenia custom AHUs faced the same technical challenges: minimize energy consumption, minimize footprint and minimize sound in a cabinet with maximum visual appeal.
The Ingenia design team and local sales representatives worked with the consultant to design three custom-built air handlers. Ingenia’s electronically commutated EC fan array saved 300 HP of energy without jeopardizing performance to bring down the total HP of all three units from the original design of 900 HP to 600 HP. Also, the 3’’ foam injected Cabinet was lined with acoustic panels in order to drastically reduce the sound power levels of 150,000 cfm systems below NC‐40 in the occupied spaces.
By combining the EC fan array to large surface ‘A’ coil arrangement, the footprint of each system was reduced by over 500 sq. ft. without increasing velocity in the systems. Moreover, by incorporating specially designed, low pressure drop heat–pipe heat exchangers in every system considerable energy savings were achieved.