Mechanical Services

Extending Lifespan. Restoring Performance. Minimising Risk

At Select Commissioning, our deep understanding of building services performance makes us the ideal partner for strategic end-of-life mechanical upgrades. We help clients modernise legacy systems — from failing pipework to obsolete air handling units — while minimising disruption and maximising operational continuity.

Our specialist upgrade programmes are designed to restore compliance, improve energy efficiency, and futureproof your building services for years to come.

Our Asset Upgrade Capabilities Include:

  • AHU Replacement & Refurbishment
    We undertake full or partial AHU replacements — from coils and motors to entire housings — ensuring enhanced airflow, heat recovery, and filtration performance. Where replacement isn’t feasible, we offer refurbishment options including fan upgrades, damper replacements, and control system retrofits.

  • Pump Replacement & Reconfiguration
    Old or inefficient pumps are replaced with high-efficiency alternatives, incorporating inverter drives and full hydraulic balancing to improve performance and reduce energy consumption.

  • Calorifier & Hot Water Plant Upgrades
    We remove and upgrade end-of-life calorifiers, cylinders, and thermal stores with compliant and efficient solutions — including plate heat exchangers and modern unvented systems.

  • Expansion Vessel & Pressurisation Unit Renewal
    Aged or incorrectly sized expansion systems are replaced with WRAS-approved components and digital pressurisation units, optimised for closed-loop system safety and stability.

  • Valve & Pipework Retrofit
    We replace obsolete, seized, or leaking valves with modern equivalents — including commissioning sets and PICVs — and reconfigure pipework layouts for improved access and performance.

  • Riser & Distribution System Replacements
    Our team handles partial or full replacements of domestic and HVAC risers, using phased access strategies to avoid downtime in occupied buildings.

  • Live-Site Installations & Temporary Services
    All upgrade works are delivered with minimal operational impact, using isolation valves, temporary bypasses, and out-of-hours scheduling where required.

Why Select Commissioning for End-of-Life Mechanical Works?

  • Commissioning-Led Design: Our upgrades go beyond basic replacement — they’re scoped, installed, and commissioned for long-term efficiency and balance.

  • Integrated Service Offering: With water treatment, commissioning, and validation in-house, we manage upgrades from system drain-down to recommissioning and compliance sign-off.

  • Data-Informed Decision Making: Our upgrade strategies begin with system performance analysis and asset condition surveys, targeting the highest-risk components first.

  • Regulatory Confidence: All works are completed to the highest standard, in line with CIBSE, BSRIA, WRAS, HSE ACOP L8, and Building Regs Part L requirements.

Smarter lifecycle management:

End-of-life doesn’t mean end of performance. At Select Commissioning, we help you make informed decisions about when and how to upgrade building services — improving safety, reliability, and compliance without unnecessary disruption.