Cx Associates completed retrocommissioning studies at Browns River Middle, Jericho Elementary, Mount Mansfield High, and Smilie Elementary schools. For these schools, we used historical energy data to benchmark each building in Energy Star Portfolio Manager and develop the sites’ Energy Usage Index (EUI). The implemented energy saving measures included adjustments to ventilation to match occupancy, modification of piping to segregate boilers and reduce losses through the standby boiler, hot water piping modifications to allow variable speed pump operation, and numerous mechanical modifications to ensure optimized operation and decreased maintenance costs.
Cx Associates calculated the EUI and Energy Star scores for this four-story building and identified that it is operating slightly better than the national average. Even so, we identified a number of opportunities to improve the building’s energy efficiency even further. While retrocommissioning was not an option due to operability issues, we were able to provide a report that provided guidance and direction concerning strategies to optimize control sequences to reduce energy use and improve comfort.
Cx Associates identified and quantified over 200 measures and identified annual energy savings opportunities of over $237,000 during the retrocommissioning study we performed for Vermont State College. The goal of the study was to identify low cost opportunities to reduce building HVAC energy use and identify measures that could be applicable across multiple buildings not included in the study. The savings we identified resulted in a payback period of only 1.2 years.
Cx Associates provided commissioning for the renovation of the historic building that is used as Middlebury College’s president’s residence. The building has been recognized for its energy efficiency, winning Efficiency Vermont’s top award for a major renovation of a commercial building. As a result of our early involvement in the project, we were able to identify an opportunity for the engineer to modify sequences and piping to ensure the heating boiler was not damaged by missing logic. Our follow up on the issue resolved a lack of communication that could have resulted in a voided boiler warranty.
Cx Associates was retained by Champlain College to commission the college’s renovation of Roger H. Perry Hall. Built in 1859 by lawyer and diplomat Edward Phelps, it is one of only 11 houses in the South Willard Street Historic District that predates the Civil War and is an Italianate-style brick home with elements of Greek revival. The college’s plan for the building included energy-efficient climate control systems, including a geothermal pump from Perry Hall's deep wells. The building was renovated to LEED standards which recognize performance in five key areas of human and environmental health: sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality.
Cx Associates provided commissioning for the new squash center on Middlebury College’s main campus, which includes nine squash courts, an entrance to the main athletic complex, and seating for hundreds of spectators. Cx Associates was retained to assist in the pursuit of LEED certification for the project. Commissioned systems included HVAC, domestic hot water, and lighting and lighting controls. Our early involvement during the design phase allowed us to develop close relationships with the college and the contractors which helped ensure the controls for the ventilation system and lighting system met the design intent and needs of the college.
Cx Associates provide design and construction phase commissioning for Middlebury College’s new Field House. Our review uncovered several issues that, when corrected, reduced first cost and increased energy efficiency. During the construction phase, we corrected over 50 issues with the rest of the team, each found during commissioning. Correcting these problems improved equipment access and maintainability, improved sequences of operation and other equipment programming, and resulted in improved environmental quality.
Cx Associates provided commissioning during Champlain College’s two-phase dormitory project to build three new residence halls on their campus. Our work ensured that the buildings conformed with the project Owner’s Project Requirements (OPR), Basis of Design (BOD), and contract documents. The project included energy efficient design elements such as heat pump systems connected to a ground source wellfield serving a multi-building district.
The University of Vermont (UVM) Davis Center was the first student center to receive LEED Gold certification for new construction from the U.S. Green Building Council. This cutting-edge, 186,000 square-foot building features a 19,000 square-foot green roof, built-in compost storage coolers, waterless urinals, and an energy efficient HVAC system. It diverts more than 60 percent of its waste from the landfill. In 2010, the Davis Center received the Innovative Achievement Award, sponsored by American Campus Communities. The Davis Center represents UVM's commitment to the environment and green building practices.