Retro Commissioning of Existing Building

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Retro commissioning is a systematic process aimed at enhancing the performance of an existing building. Through a comprehensive approach that considers the entire building system, recommissioning identifies operational improvements to enhance occupant comfort and energy efficiency.

We receive frequent inquiries from clients, tenants, and building operators who are experiencing subpar environmental conditions. Subsequently, we are engaged to recommission buildings . Many of these structures either were never adequately commissioned or have suffered from insufficient maintenance.

An in-house team commissioning and tracking program will be developed in coordination with the construction program.

The commissioning process includes static pre-commissioning, conducted before system activation. Initial tests during pre-commissioning ensure that system volumes are suitable for testing and balancing.

If necessary, adjustments, such as pulley and belt changes for belt-driven fans, are made. Should the main volume deviate beyond a 10% range from the design capacity, a comprehensive review of the entire system's performance is conducted, and suggestions or recommendations are provided to the client.

The Recommissioning Process:

Step 1: Planning and Owner/Occupant Complaint Interviews

  • Initiate the process by planning the recommissioning activities.
  • Conduct interviews with owners and occupants to understand their concerns and requirements.

Step 2: Investigation of the Current Building Operation and Recommissioning Scope

  • Examine the current functioning of the building systems.
  • Identify areas that need improvement and define the scope of recommissioning.

Step 3: Implementation of Recommissioning Based on Findings

  • Execute the recommissioning plan, addressing issues and optimizing systems.
  • Implement changes identified in the investigation phase to enhance performance.

Step 4: Hand-over and Completion

  • Conclude the recommissioning process.
  • Hand over the optimized building systems to the owner/occupants, ensuring they meet the desired standards.

Key Services

The recommissioning activities you've outlined involve comprehensive adjustments and optimizations to ensure the efficient and effective operation of air conditioning and environmental control systems. Here's a breakdown:

Rebalancing of Air Conditioning Systems:
  • Recalibrate VAV Boxes to ensure optimal airflow and temperature control.
  • Adjust air distribution for uniform comfort.
Rebalancing of Chilled Water Systems:
  • Optimize chilled water distribution and adjust control setpoints.
  • Ensure proper functioning of the entire chilled water system.
Reproving and Correcting BMS Sequence of Operation Controls:
  • Review and validate the Building Management System (BMS) sequences.
  • Correct any discrepancies or inefficiencies in the operation controls.
BMS and Environmental Controls Sensor Recalibration:
  • Recalibrate sensors for accurate data input.
  • Ensure precise monitoring and control of environmental conditions.
Environmental Checks and Tests:
  • Environmental Checks and Tests:
  • Verify compliance with set standards and regulations.
Sound Level Measurements:
  • Measure and analyze sound levels to ensure compliance with regulations.
  • Identify and mitigate any excessive noise issues.
Preparation of Detailed Reports:
  • Document all adjustments and optimizations made during the recommissioning process.
  • Provide detailed reports outlining improvements and any recommendations for future maintenance or enhancements.

All commissioning works are carried out in accordance with the CIBSE and BSRIA Com­missioning Codes together with the ASHRAE, NEBB codes of practice as applicable and all instrumentation is regularly tested and calibrated to national standards.