The Importance of System Recalibration
Re-Commissioning with McCownGordon
Re-Cx, or Re-Commissioning, involves assessing and enhancing a building’s existing systems to maintain or boost operational performance. Unlike RCx, which targets previously uncommissioned structures, Re-Cx focuses on those that were once commissioned but have since experienced drift due to usage changes, altered schedules, or wear over time. The goal is to realign systems with current needs and original design intent.
Reasons for re-commissioning a building
Over the lifespan of a building, its systems can drift away from their intended performance because of equipment wear, operational changes, and evolving occupancy demands. Re-commissioning offers benefits such as:
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Returning building operations to optimal efficiency.
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Cutting energy use and lowering utility costs.
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Improving occupant comfort and indoor air quality (IAQ).
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Lengthening the lifespan of mechanical and electrical systems.
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Reducing maintenance costs by proactively spotting and fixing issues.
Re-commissioning Key Benefits
- Energy Savings: Reduces energy consumption by 5-15% annually.
- Optimized Performance: Ensures systems operate as intended and at peak efficiency.
- Cost Savings: Identifies operational inefficiencies that lead to lower utility and maintenance costs.
- Extended Equipment Life: Reduces wear and tear on mechanical and electrical systems.
- Improved Indoor Environmental Quality: Enhances occupant comfort through better ventilation and temperature control.
Financial Impact
- Re-Cx implementation costs range from $0.15 – $0.75 per square foot, depending on the scope.
- Typical payback period is 1-3 years due to energy and operational cost savings.
- Non-energy benefits, such as increased occupant productivity and reduced maintenance, enhance overall ROI.
Jereme Nollett, PE, CCP, EMP
Commissioning Executive
