United Kingdom

1 London Bridge

United Kingdom – London

Temperate Existing Building

Organisation : St Martins Property Group

21.2 %
annual energy
savings achieved
Level : Gold

Energy performance

21.2 %
Energy savings
203.3 kWh/m²/year
Absolute performance
16.7 kgCO₂/m²/year
Carbon intensity

Operational Context

1 London Bridge is a commercial office building, comprising 2 x water-cooled chillers for AHU circuits, 2 x Cooling Towers, 3 x condensing boilers for DHWS, VAVs and perimeter heating, 4 x main office AHUs and 2 x other AHUs for additional floor ventilation.

Key measures implemented

The main actions implemented to reduce the energy consumption of this building.

Technical Optimization

  • Deployment of building analytics platform to digitalise maintenance practices and apply targeting and monitoring via Fault Detection & Diagnosti
  • Time-clock review and adjustments to fit with building occupancy,
  • Removing of overrides and BMS anomalies,
  • Upskilling the engineering team via using building analytics platform as part of their daily plant checks and equipment performance management
  • Validation and optimisation of the chillers staging and sequencing,
  • Validation and optimisation of the boilers staging and sequencing,
  • Implementation of return temperature setpoint control strategy on the boilers,
  • Implementation of weather compensated setpoints across AHUs, boilers and chillers via the BMS,
  • Validation and fine-tuning of pressure control loop on ventilation equipment,
  • Validation and fine-tuning of heat recovery control loop on ventilation equipment as the AHUs are not equipped with heating coils,
  • Re-calibration of pressure sensors across main office AHUs,
  • Mechanical validation of VAV boxes (Vmin, Vmax, Vnom - Local and BMS)
  • Mechanical validation of the re-heat coils across floor VAVs,
  • Implementation of floor optimisers to ensure thermal comfort prior occupancy,

Use Sufficiency

  • Additional visits for BMS engineers to get the BMS infrastructure and software to a steady state
  • Dedicated Building Performance Manager to distribute the data-led insights and deliver the optimisation via support from supply chain

Technical context

Floor area 27,379 m²
Number of floors 12
Activity type Office
Year built 1986
Heating system Gas boiler

Consumption data

Measurement periods

Reference period
Dec 2021 - Sep 2023
Monitoring period
Aug 2024 - Jul 2025

Annual Energy Impact

Reference 7,030,483 kWh/year
Energy Savings 1,492,200 kWh
Avoided Emissions 456.47 tCO₂/year