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Case Study
20 Fenchurch Street 

Visiting one of London's most iconic buildings, also known as "The Walkie-Talkie," on its Green Team Meeting day was a truly insightful experience. It was exciting to see property managers, tenants, and businesses all in one place, sharing their energy-saving wins through the Go Dark Project and other green efforts.

March 2022 - February 2023

Location: London

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1 year achievements

2nd Place

Winner

36.49%

Energy savings

13,425,498 kWh

total savings

£ 2,272,298

savings

Building characteristics

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100,284 m2

total area 

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2008

Construction completed

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37 floors

(plus three-story "sky garden")

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Electricity supply (100% Renewable energy), Roof-mounted PV, BMS, HVAC, DHW system (Domestic Hot Water)

Building Systems

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422 bicycles, 19 motorcycles parking spaces 

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Ocupational density

1 person per 10m2

BREEAM Excellent (80.2%),

Certification

Top actions

Management and behaviour

  • Conducted green team meetings to boost awareness and discuss the sustainability agend​

  • GWS Tenant and Simmtronic specialists conducted assessments and maintenance to enable energy adjustments on individual floors​

Minor technical and re-programming

  • Initiated Project “ Go Dark”– (Switching off lights from 11pm to 5am), saved 785,000 kI’Wh in July and August compared to 2019​

  • Adjusted and reset the lighting dimmer by 40% in the lobby area and switched off exterior lights.​

  • Started LED Lighting replacement programme by conducting a lighting review of the emergency staircase, B1, B2, and back of house (replaced approx. 1,140 Lights)​

  • Implemented Boiler turn off procedure which switches off the boiler when the external temperature exceeds 28 °C​

  • Adjusted BMS setpoints in the building to control and manage the energy consumption of the building better ​

  • Implemented Cooling tower variable set points procedure by using outside wet bulb temperature proxy to achieve maximum efficiency during summer

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Don't just take it from us

What RO say

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"CUBE provides a unique opportunity for us to collaborate with our tenants as we continue our journey to a more sustainable future. As a landlord, engagement with our tenants is paramount, and improving energy efficiency across our buildings is a key priority for us. CUBE is a first for the real estate sector and the competition comes at an important time"

- Edward Rowlandson, Group Managing Director, the RO

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