This phased project is a demolition & replacement of the existing air handling units, exhaust fans, ductwork, hydronic piping (HTW, LTW & CHW), HTW-LTW heat exchangers, hydronic pumps for chilled and low temp water, zone based VAVs, temperature controls, Variable Frequency Drives, 480v motor control center, and 120v sub panels at the O’Hare International Airport Rotunda Building between Terminals 2 & 3. Temporary heating, cooling, supply, return, and exhaust air were provided during each phase of the project in coordination with the airport staff and vendors to maintain temperature requirements of facilities and tenants. The new air handling units, exhaust fans, and hydronic pumps are variable speed motors inclusive of new parallel BAS network controls fully integrated into the existing network. Each of the 10 air handling units was provided with a new chilled water and low temp hydronic piping system to feed the coils. Apart from construction of the new HVAC system, the project included functional testing of the BAS, testing & balancing and full system commissioning in direct coordination with the facilities existing system & operations.
