
What is Retro-Commissioning?
Retro-commissioning (RCx) is the systematic process of assessing, testing, and optimizing the performance of an existing building’s systems, including HVAC, electrical, and mechanical infrastructure.
At Ziltose, we specialize in retro-commissioning services for data centers, commercial buildings, and industrial facilities, ensuring improved energy efficiency, lower operational costs, and enhanced occupant comfort.

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Performance Improvement: Identifies and implements enhancements to existing systems.
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Energy Efficiency: Focuses on optimizing energy use and reducing operational costs.
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Enhanced Comfort: Improves indoor environmental quality for occupants.
4. System Longevity: Extends the lifespan of building systems and equipment.
5. Comprehensive Assessment: Conducts thorough evaluations of current systems and operations.

What we offer

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Owner’s Complaint Review
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Initial Site Survey
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Design Review
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Design Upgrade as Per Applicable New Codes and Standards
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Electrical Stability Verification- Solution
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Life Expectancy Review of All Equipment’s
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Rebalancing Of Air Conditioning Systems Including VAV Box Recalibration
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Rebalancing Of Chilled Waters Systems and Implementing the Correct Control Setpoints
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Rebalancing Of Domestic Hot Water Systems
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Reproving And Correcting BMS Sequence of Operation Controls
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BMS And Environmental Controls Sensor Recalibration
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Fire Alarm System Fault Clearance And C&E Testing.
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Owner’s Complaint Review
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Initial Site Survey
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Design Review
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Design Upgrade as Per Applicable New Codes and Standards
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Electrical Stability Verification- Solution
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Life Expectancy Review of All Equipment’s
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Rebalancing Of Air Conditioning Systems Including VAV Box Recalibration
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Rebalancing Of Chilled Waters Systems and Implementing the Correct Control Setpoints
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Rebalancing Of Domestic Hot Water Systems
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Reproving And Correcting BMS Sequence of Operation Controls
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BMS And Environmental Controls Sensor Recalibration
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Fire Alarm System Fault Clearance And C&E Testing.

Why Choose Ziltose for Retro-Commissioning?
✅ Energy Savings: Reduce energy costs by up to 30% with optimized operations
✅ Improved System Lifespan: Prevent premature equipment failures
✅ Compliance & Sustainability: Meet LEED, ASHRAE, and ISO energy standards
✅ Enhanced Comfort & Productivity: Maintain optimal indoor air quality and thermal comfort
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What is data center commissioning, and why is it important?Data center commissioning is a structured process that ensures all critical systems (power, cooling, IT infrastructure) function as designed before going live. It minimizes the risk of failures, enhances uptime, and ensures compliance with Uptime Institute, ASHRAE, and ISO standards.
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What are the different levels of commissioning (L1 to L5) in a data center?Commissioning is divided into five levels: Level 1 – Factory Acceptance Testing (FAT): Equipment testing before shipment. Level 2 – Site Acceptance Testing (SAT): Verifying installation at the site. Level 3 – Pre-Functional Testing (PFT): Initial testing of individual systems. Level 4 – Functional Performance Testing (FPT): Integrated system performance testing. Level 5 – Integrated System Testing (IST): Full-scale operational testing under real-world conditions.
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What is the role of a commissioning agent in data center projects?A commissioning agent (CxA) ensures that the facility meets its design intent by overseeing installation, testing, and performance validation. They act as an independent third party to verify compliance with standards and project specifications.
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What are the Uptime Institute commissioning requirements for Tier III & Tier IV data centers?The Uptime Institute mandates rigorous testing protocols, including redundancy validation, integrated system testing, and failure scenario simulations to ensure reliability for Tier III (N+1) and Tier IV (2N+1) data centers.
