Key Facts

Project Discipline

Central Plant Replacement

Customer

Savills

Duration

2 Years

Location

Moor House, 120 London Wall EC2Y 5ET

The Project Consist of

Moor House’s central plant replacement is the most ambitious challenge delivered by our Projects division to date. As the industry moves toward Net Zero 2050, this project supports long-term decarbonisation by transitioning the building to an Air Source Heat Pump (ASHP) system delivering both Chilled Water (CHW) and Low Temperature Hot Water (LTHW).

Key System Upgrades

  • BMS

Upgraded to Tridium Niagara N4, with new backbone, server racks, MCC panels, and field devices.

  • Chillers

Replaced 6 air-cooled chillers (5 MW total), with Mitsubishi New ASHP’s and upgrade all primary and secondary pump sets.

  • Heating

Removed 3 gas boilers (1 MW each), replaced with ASHPs and LTHW buffer vessels plus replacement of LTHW pump sets.

  • Fan Coil Units (FCU’s)

Levels 1–2 upgraded with new system controls and valve set upgrades to undertaken, to enable future migration onto variable flow; there are tenantled upgrades ongoing from Levels 3–16.

  • Ventilation

8 AHUs refurbished to support variable airflow and demand-led controls.

Progress Highlights (As of November 2025)

  • 8no. supply and extract Air Handling Units (AHU’s) refurbished and operational with variable airflow.
  • All 3 gas boilers decommissioned and removed from site.
  • 5no. 500-tonne crane lifts completed, with all plant now in position.
  • 4no. ASHP modules commissioned, adding 2 MW cooling, total now >5 MW.
  • Buffer vessels connected, adding 10,000 litres of thermal storage to the system.
  • System now fully migrated onto the electrical ASHP system, marking full disconnection of the gas systems on site.

Challenges

  • Complex logistics and heavy-lift coordination.
  • Integrating new systems in a live, fully occupied building.

Opportunities

  • Major step toward Net Zero and energy-efficient operations.
  • Future-ready infrastructure with smart, demand-led control.
  • Enhanced tenant comfort and long-term operational savings.
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