Retro Commissioning
Optimizing What You Already Own
Roth Southeast’s retro-commissioning services help facilities regain optimal performance by identifying and resolving inefficiencies in HVAC and control systems. Our team evaluates existing building systems and makes strategic adjustments to restore functionality, enhance occupant comfort, and lower energy usage-without expensive equipment upgrades.
In a study of 60 commercial buildings, over 50% were found to suffer from control problems. Experience has shown that retro-commissioning consistently saves between 10% to 20% of building energy costs while improving occupant comfort and operations.
What is Retro-Commissioning?
Retro-commissioning (RCx) is a systematic, documented process for optimizing of mechanical, electrical and control equipment. While many tasks involved in retro-commissioning may be considered energy conservation measures, retro-commissioning also involves basic system measures including: control sequence verification, sensor checkout, verification of operation parameters and equipment operation, as ell as adjusting or repairing poorly functioning equipment.
Our process focuses on:
- Identifying underperforming equipment or controls
- Optimizing HVAC setpoints and scheduling
- Calibrating sensors and verifying sequences of operation
- Implementing low-cost/no-cost energy-saving measures
With Roth Southeast, you’re not just restoring performance, you’re preventing future drift, improving occupant experience, and uncovering opportunities for operational savings.
Examples of Energy Efficiency Opportunities identified in RCx
Optimizing fresh air economizer operations
AHU Supply fan static pressure
Reheat and variable volume control sequences
Variable frequency drives for pumps and fans
Building management system operation sequence
Review of humidity set point ranges
Demand-based ventilation system improvements and validation
Chiller discharge temperature – automation of reset
Identification and elimination of simultaneous heating and cooling situaitons
Why Facilities Choose Retro-Commissioning
Our Approach
We begin with a detailed analysis of your current building automation and mechanical systems. Using on-site assessments and data trend reviews, our team develops a prioritized list of corrective actions.
Our team then collaborates with your staff to implement solutions – adjusting control sequences, updating BAS logic, and fine-tuning equipment performance.
Throughout the process, we provide full documentation, staff training, and post-RCx follow-up support to ensure long-term success.
Common Retro-Commissioning Targets
- Air handling units (AHUs)
- Chillers and boilers
- Variable air volume (VAV) systems
- Building automation system (BAS) logic
- Occupancy schedules and ventilation rates
- Zone-level temperature and humidity control
Typical Symptoms
If your facility is experiencing any one of the following, you may benefit from a system review
- Unexpected energy spikes
- Temperature fluctuations
- Frequent occupant complaints
- Equipment short-cycling or failure
- New building design that was cost centric, not energy centric design approach
- Old valves/actuators, pneumatic controls
- Poor building maintenance
- Limited building operator interaction with BAS
Retro-commissioning is ideal for buildings over 5 years old, facilities that have undergone operational changes, or properties that were never properly commissioned to begin with.
Next Steps
Request a system evaluation with one of our experts. We’ll walk your site, evaluate your controls, and deliver a roadmap for performance improvement tailored to your building’s unique needs.
