Hyatt Regency Chicago Reduces Water & Energy Demands


The building is divided into three zones to stabilize pressure. At each zone, pressure reducing valve stations maintain each of the zone’s pressure requirements and the two 119-gallon bladder tanks installed in the top floor mechanical room help to sustain constant pressure to all zone’s regardless of building flow demands.

East Tower
The east tower of Hyatt Regency Chicago sits across the street from the west tower and was the second phase of a two-phase project. The west tower completed during the first phase in 2010.


The 36-year-old existing water system in the east tower never worked efficiently according to Dennis Sartain, project executive and vice president of Abbott Industries, headquartered in Bensenville, IL. Sartain oversaw the project from design throughout construction and was a main factor in its 12-week completion.

“There were many deficiencies in the existing system that reduced the efficiency of the building,” said Sartain.

Those deficiencies included unequal hot and cold water to room fixtures and waiting for hot water to arrive to a fixture, which was related to the original zone design that had three zones spread over 40 floors, requiring a reconfiguration of three zones.

According to Sartain, the problem was the mid-zone because its water supply pressures (Hot and Cold) could not stay balanced. The hot and cold water pressure reducing valves were located at opposite ends of the supply risers and had a significant pressure differential between the hot and cold supply pressure to that zone.

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Posted by on Oct 1st, 2011 and filed under Feature Story. You can follow any responses to this entry through the RSS 2.0. Both comments and pings are currently closed.

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