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JIM STOCKE, from page 9

performance improvement in existing facilities’ equipment and systems and adjusts this performance to improve efficiency. Retrocommissioning is applied to older buildings that were never commissioned. Usually the building equipment and control systems operate on old pneumatic control systems that are very unreliable and inefficient. Some of these buildings could be using old Direct Digital Controls systems that have never been upgraded. These older pneumatic systems usually operate from time clocks, and in some cases, the time clocks no longer function, resulting in a system that is completely outdated, unreliable, and most likely costing additional money. When retrocommissioning is properly done, the owner will receive a detailed outline on the building’s equipment and controls which describes how their output compares to new expected norms and technology. Other building issues may be highlighted as well. Typically, establishments that have not been retrocommissioned have a higher operating cost per square foot than buildings of the same stature that have been upgraded. There is significant savings associated with retrocommissioning, and it will provide a quick pay back! The expense for the cost of this service can be easily made up by the money saved by the implemented changes. More importantly, the buildings that have been retrocommissioned, and have had the equipment and controls upgraded, will also provide better indoor air quality and less occupant complaints. In all cases, the answer to the question, “Who needs commissioning?” is this: All building owners who don’t already have a plan like this in place! It is important to understand the value of it, and the savings it can generate, and the avoidance of unexpected big maintenance issues in the future. Whether you need commissioning of a new building, recommissioning of an existing one, or retrocommissioning of an older one, these services will provide peace of mind for every owner. Hiring a commissioning agent who understands buildings and their intricate systems should be part of each owner’s overall plan in building design. JIM STOCKE is a senior mechanical designer/ commissioning agent at EAPC Architects Engineers. He can be reached at jim.stocke@ eapc.net.

BENEFITS OF COMMISSIONING: ❚ ❚ Increased energy efficiency ❚ ❚ Lower operating costs ❚ ❚ Healthier and more comfortable environment for occupants ❚ ❚ Increased productivity and happiness for occupants ISSUES THAT MAY INDICATE IT’S TIME TO RECOMMISSION: ❚ ❚ Feeling cold drafts ❚ ❚ Seeing frost on the walls ❚ ❚ Equipment operating more than needed ❚ ❚ Equipment has dampers propped open or held shut ❚ ❚ Complaints from occupants regarding areas of the building are too hot and others are too cold ❚ ❚ Building occupants seem overly tired and sluggish or unproductive in the middle of the day ❚ ❚ Air in the building is smelly and stale ❚ ❚ Lights in some areas seem too bright or too dim causing eye strain or headaches for some ❚ ❚ Unusually high utility costs ISSUES THAT MAY INDICATE IT’S TIME TO RETROCOMMISSION: ❚ ❚ Feeling cold drafts ❚ ❚ Seeing frost on the walls ❚ ❚ Equipment is operating more than needed ❚ ❚ Equipment has dampers propped open or held shut ❚ ❚ Complaints from occupants regarding areas of the building that are too hot and others that are too cold ❚ ❚ Building occupants seem overly tired and sluggish or unproductive in the middle of the day ❚ ❚ Air in the building is smelly and stale ❚ ❚ Lights in some areas seem too bright or too dim, causing eye strain or headaches for some ❚ ❚ Unusually high utility costs ❚ ❚ Building equipment is more than 10-15 years old ❚ ❚ HVAC systems are pneumatic ❚ ❚ Building equipment has outlived its life expectancy according to ASHRAE standards

By hiring a commissioning agent or firm to inspect a building, it can increase savings because of their experience and success with finding and implementing efficiencies. When a structure is properly commissioned, the money spent for this service pays for itself in cost reductions down the road. The commissioning agent provides a safety net to the owner by guaranteeing that all building design needs and requirements are met. Agents are on site throughout the construction phase to inspect the installation of all building systems, test each building system, ensure owners receive all pertinent documentation for the building, and oversee that the training for the maintenance staff is delivered. “The commissioning process verifies that the building design achieves its owner’s requirements and goals, that the building is designed to operate the way it is supposed to, and that it will operate as efficiently as possible.” Commissioning can be performed during construction and up to 10-12 months after the building is occupied to certify that any issues with the building are resolved. A final commissioning report is then presented when its agent has concluded the complete process. Recommissioning is a methodical process of testing an existing facility’s systems and equipment (five to eight years old) to make sure they are still functioning according to the original design intent or to adjust any deviation from the original design. Schedules are inspected, and the building equipment is tested to make sure everything is still operating properly and to code. There may be savings opportunities associated with the inspection if things have gone astray. Recommissioning will show how to keep the existing control system of the building operating efficiently and will also indicate if any equipment upgrades are necessary to potentially increase energy savings. Retrocommissioning identifies areas for

THE ZWEIG LETTER May 28, 2018, ISSUE 1250

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