Retrocommissioning has multi-faceted benefits – operating, maintenance and replacement cost reductions – but its value is still hard to market to building owners and energy utilities. This presentation details a number of successful retrocommissioning projects in Vermont with proven energy and maintenance savings. It also details an innovative consulting contract Cx Associates has structured to maintain the energy savings realized through retrocommissioning, as well as help control maintenance costs and identify further opportunities. Building owners and efficiency utilities are convinced by the facts of real savings – come listen to some examples!
Success stories include a 70,000 square foot, 100-year old, 4-story brick building with office and retail spaces with a improvements made to its central heat pump system; a 42,000 square foot public library with BMS control upgrades, and a 2-story office building with a central hydronic heating system and rooftop unit cooling systems. Improvements range from simple maintenance items to VFD retrofits to BMS installations.
We will detail the audit and analysis we performed to gain commitment from both the building owner and the energy utility, the design process, the actual construction trials and tribulations, and methods of proving the savings outcome. The projects have been in operation for a minimum of nine months and we will discuss their ongoing performance. Real-life examples of the system and human issues we encountered in these older buildings, and the collaboration it took to overcome them, will be described.
In addition, we have entered an “Operational Performance” contract with one of our retrocommissioned buildings. This contract oversees the preventative maintenance program to ascertain its effectiveness, provides technical support for maintenance issues, monitors energy saving retention, ensures efficient operation of the HVAC systems, and identifies further opportunities. In this presentation we will discuss the process, successes and challenges of such an innovative program.