Hyatt Regency | San Francisco International Airport

Integral Group worked with the Hyatt Regency at San Francisco International Airport on a ground-breaking free cooling, chilled water pumping, and control system upgrade. The project resulted in energy savings of approximately $90,000 per year and a utility rebate of slightly under $60,000. More importantly, there was an improvement in guest comfort in meeting rooms and conference areas due to the higher level of temperature control and added outside air ventilation.

Integral Group first completed an analysis of the existing HVAC system, including flow measurements on the chilled water and condenser water side of the chillers. Power and temperature measurement and trending were included in the analysis. Data from the existing building and powerful modeling tools were used to determine potential energy savings and comfort impacts of a series of system modifications. Contractors were consulted to estimate construction costs. These data were combined to come up with ROI and payback calculations.

After reviewing the recommendations, the hotel management decided to implement all recommended modifications. These recommendations included modifications to the chilled water system and several control system changes. The control system replacement had the requirement of using the BACnet protocol. Integral Group prepared all construction drawings and specifications, coordinated the bidding process, and reviewed much of the construction progress. At the completion of the project, Integral Group conducted a simplified commissioning process. All of the logic elements of the new control system were tested. New permanently installed flow meters allowed for fast flow and chilled water performance verification.