Cx Associates provided commissioning services for the renovation of this three-story historic mansion. The systems included in our commissioning were HVAC, domestic hot water, lighting and lighting controls. We identified a number of issues during the commissioning process, including variable refrigerant flow controls that didn’t meet specified sequences of operation, an isolation damper that was not opening properly to allow outside air into the heat recover unit, and water pooling around the roof top units. The identified issues were resolved, removing the potential for future issues.