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
1 year achievements
2nd Place
Winner
36.49%
Energy savings
13,425,498 kWh
largest gross savings
£ 2,272,298
savings
Building characteristics
100,284 m2
total area
2014
Construction completed
37 floors
(plus three-story "sky garden")
Electricity supply (100% Renewable energy), Roof-mounted PV, BMS, HVAC, DHW system (Domestic Hot Water)
Building Systems
422 bicycles, 19 motorcycles parking spaces
Ocupational density
1 person per 10m2
BREEAM Excellent (80.2%),
Certification
Top actions
Management and behaviour
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Conducted green team meetings to boost awareness and discuss the sustainability agenda
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GWS Tenant and Simmtronic specialists conducted assessments and maintenance to enable energy adjustments on individual floors
Minor technical and re-programming
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Initiated Project “ Go Dark”– (Switching off lights from 11pm to 5am), saved 785,000 kWh in July and August compared to 2019
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Adjusted and reset the lighting dimmer by 40% in the lobby area and switched off exterior lights.
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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)
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Implemented boiler switch off procedure which switches off the boiler when the external temperature exceeds 28 °C
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Adjusted BMS setpoints in the building to control and manage the energy consumption of the building better
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Implemented Cooling tower variable set points procedure by using outside wet bulb temperature proxy to achieve maximum efficiency during summer
Don't just take it from us
What Savills say
"We were extremely excited to participate in the CUBE Competition. Gamification provided an added incentive to participate competitively on the very important issue of energy conservation. We were proud to be the highest gross saver across the whole competition, and to have showcased our innovation and hard graft in making savings. Our occupiers and landlord were equally as proud of 20 Fenchurch Street’s collaborative achievement."
- Sean Harlow, Head of Engineering at 20 Fenchurch Street, Savills