Enhancing Building Performance Through Recommissioning (RCx)

EFI Engineering – Building Efficiency Through Expertise

As buildings age and their operations evolve, performance can drift away from the original design intent. Equipment wears, control strategies become outdated, and system inefficiencies begin to emerge. Recommissioning (RCx) is one of the most effective ways to restore a facility’s performance, reduce operational costs, and optimize energy use—without major capital upgrades.

At EFI Engineering, our multi-disciplinary team provides comprehensive RCx services that help building owners uncover efficiency gaps, correct operational issues, and ensure systems are working exactly as intended.

What Is Recommissioning (RCx)?

Recommissioning is a systematic, data-driven process that evaluates and optimizes the performance of existing building systems. Our engineers audit, verify, and document the operation of major mechanical, electrical, and control systems including:

• HVAC systems

• Lighting systems

• Building automation and controls

• Ventilation and air quality components

• Pumps, fans, and heating/cooling equipment

• Central plant systems and supporting infrastructure

By deeply analyzing system performance, we identify where the building is underperforming, where energy waste is occurring, and how operational strategies can be improved—often at minimal cost.

What You Gain From Recommissioning

RCx offers measurable benefits that support both business goals and occupant comfort:

✔ Improved Energy Efficiency

Fine-tuning systems often results in significant reductions in energy use, lowering utility bills without major upgrades.

✔ Enhanced Comfort & Air Quality

Properly calibrated HVAC and control systems improve temperature stability, air quality, and overall occupant experience.

✔ Reduced Operational Costs

Identifying and correcting faulty equipment, improper settings, or inefficient sequences reduces maintenance costs and extends equipment life.

✔ Increased System Reliability

Recommissioning helps ensure that building systems operate dependably under normal and peak loads.

✔ Sustainability & Compliance

RCx supports energy management plans, greenhouse gas reduction goals, and compliance with municipal and provincial efficiency requirements.

Why Recommissioning Matters

Even well-designed buildings drift from optimal performance over time. RCx is a highly cost-effective strategy to:

• Maximize the return on your existing infrastructure

• Avoid unnecessary capital spending

• Improve occupant satisfaction

• Reduce downtime and maintenance issues

• Meet sustainability and regulatory goals

Recommissioning can often generate savings that pay back the service cost in as little as one to three years.

EFI Engineering: Your Partner in Building Optimization

EFI Engineering’s RCx process is built on technical expertise, detailed diagnostics, and actionable solutions. Our team works collaboratively with building operators, facility managers, and owners to deliver improvements that are practical, measurable, and sustainable.

Whether you’re looking to enhance energy performance, modernize system controls, or simply restore your building’s intended operation, EFI Engineering can help you achieve high-performing, cost-efficient results.