The Importance of System Recalibration
Re-Commissioning with McCownGordon
Re-Commissioning (Re-Cx) is a method for diagnosing and refining building operations to ensure systems continue to run smoothly and efficiently. It’s not to be confused with Retro-Commissioning (RCx), which deals with buildings lacking any prior commissioning effort. Re-Cx applies when a previously commissioned building requires system readjustments due to operational shifts, occupancy changes, or declining system performance.
Why might a building require re-commissioning?
As buildings age, their systems often deviate from initial design performance because of wear and tear, changes in how they are operated, and shifts in occupancy patterns. Re-commissioning (Re-Cx) serves to:
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Bring building systems back to peak operational efficiency.
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Lower energy consumption and cut down on utility expenses.
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Boost occupant comfort and improve indoor air quality (IAQ).
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Prolong the useful life of HVAC and electrical equipment.
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Decrease maintenance costs by detecting and resolving problems early.
Re-commissioning Key Benefits
- Energy Savings: Reduces energy consumption by 5-15% annually.Â
- Optimized Performance: Ensures systems operate as intended and at peak efficiency.Â
- Cost Savings: Identifies operational inefficiencies that lead to lower utility and maintenance costs.Â
- Extended Equipment Life: Reduces wear and tear on mechanical and electrical systems.Â
- Improved Indoor Environmental Quality: Enhances occupant comfort through better ventilation and temperature control.Â
Financial Impact
- Re-Cx implementation costs range from $0.15 – $0.75 per square foot, depending on the scope.Â
- Typical payback period is 1-3 years due to energy and operational cost savings.Â
- Non-energy benefits, such as increased occupant productivity and reduced maintenance, enhance overall ROI.Â
Jereme Nollett, PE, CCP, EMP
Commissioning Executive
