Efficiency & Sustainability Strategies
A variety of innovative engineering and energy-related design decisions make this a highly sustainable building.
The heating system is "hybrid" geothermal, combining closed-loop vertical wells with a gas-fired condensing boiler. This type of system allows fewer wells to be dug (saving capital cost) and provides fuel flexibility (between electricity and gas) as well as reliable heating for the owner. The HVAC layout takes advantage of the transfer of energy from rooms that may need heating while others require cooling. The higher grade boiler heat is also available to supplement the make-up air handler which serves the food service area.
A comprehensive BAS control system, including individual room temperature control, variable-speed fans, and pumping and energy sub-metering, was installed allowing both fine-tuning of energy use plus billing for the food service functions. Common areas have CO2 control of outdoor air, which reduces the ventilation rate during low occupancy periods.