WCES - 40 Holborn Viaduct - WCES Certificate

Energy performance

34.0 %

Energy savings

158.7 kWh/m²/year

Absolute performance

36.4 kgCO₂/m²/year

Carbon intensity

Operational Context

We walked into a pitch-black room, where the building manager said, 'This is how we run meetings now to save energy!' Although fun and lighthearted, the 40 HV team doesn't mess around when it comes to occupier engagement. Through small actions and minor reprogramming, the building achieved major energy savings and became the first-ever winner of the CUBE award

Key measures implemented

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

Efficiency Investments

Installed LED lights and PIR (passive infrared) sensors
Installed CO2 sensor on each floor to maintain ventilation system and which also reduced the running time of fan coil units

Technical Optimization

Turned down gas boiler flow temperature from 80°C to 60°C to save energy
Optimised chillers and boilers by using programmable thermostats: switch off boilers when outside temp is 15°C and chillers stop running when outside temp drops to -2°C
Reduced corridor lighting to 10% and installed motion sensors for lights in garage
Used night purging technique in summer to introduce fresh cool air at night to reduce overheating
Limited water purging only to the weekends to reduce the use of water pumps
Lagged pipes on roof with aluminium casing

Use Sufficiency

Conducted regular and quarterly CUBE meetings combined with green committee of the building
Circulated newsletters to tenants to create awareness and discuss ideas

Technical context

Floor area 16,467 m²

Consumption data

Measurement periods

Reference period

Jan 2019 - Dec 2019

Monitoring period

Mar 2022 - Feb 2023

40 Holborn Viaduct