Savvy lighting and heating saves £355k a year in RBS

Savvy energy saves £355k a year in Royal Bank of Scotland Group

Managing operating costs is high on the agenda of every business – large or small. With this goal in mind, Royal Bank of Scotland Group set out to maximise the effectiveness of the existing Building Management System that was in place at their flagship office in London, to help achieve its 15% energy reduction target.

Reducing energy consumption with minimal capital investment
The main aim of the project was to focus on doing more with the building infrastructure and systems already in place, meaning that the cost of the simple and innovative energy saving solutions were recouped in less than two months.

This was achieved by close collaboration between occupants, building management and energy experts. An out-of-hours survey of the building gave some key insights which were fed into the computerised Building Management System (BMS). The team then identified a number of actions that would refine the building’s heating, ventilation, air conditioning (HVAC) and lighting controls to ensure that the systems operated in line with when the building is occupied, therefore saving valuable energy. Another simple yet effective step was to make sure that this specialised system controlled all the main HVAC equipment, in turn reducing the opportunity for manual error.

Other measures adopted included:

• Using fresh air to cool the building rather than using air conditioning

• Changing the office temperature based on occupant feedback instead of outside temperature hold-offs • Identifying and repairing any defective HVAC equipment

• Consolidating the control system to ensure that boilers and chillers aren’t operating concurrently

• Re-commissioning the building’s lighting control system

Total annual cost savings expected from introducing these measures into our top 40 energy consuming offices would see a saving of £4.1m.

According to John Hayes, Head of Workplace Services, the payback is almost immediate. “We already had the Building Management System in place so it was a case of coming up with a control strategy and re-commissioning. We’re making maximum use of what is in front of us, which is why it’s so attractive and it’s providing significant savings that will sustain going forward. Following on from the success of this project, similar measures have been replicated in our top 40 energy consuming buildings which have reduced our operating costs by £4.1m.”

Results £355,000 = Total annual cost saving for 280 Bishopsgate




With over 2,500 properties across the UK ranging from offices to small high street retail units, reducing energy costs is an area of significant focus for Royal Bank of Scotland group. 280 Bishopsgate in the heart of the City of London houses 2,700 employees over 12 floors and is leased by Royal Bank of Scotland. It’s representative of the multi-occupancy properties that together account for 60% of the company’s energy spend.
£340k Saved per year in energy consumption
£15k Saved per year in gas consumption



Unit saving & reduction (%)

Equivalent to


£340K/ year

3.2GWh / year

26% reduction

Average annual electricity consumption of 1,000 households*3.2GWh/ year of size electricity. Average household consumption is 3,300KWh or 0.003GWh so is the equivalent of 1,000 households worth of electricity

Natural Gas

£15K year

0.4GWh / year

35% reduction

Average gas consumption of 24 households**0.4GWh gas saving.< Average household consumption is 16,500kWh or 0.0165GWh or 24 households worth of gas (0.396)

£4.1m = Total annual cost saving from introducing these measures into our top 40 energy consuming offices *Ofgem Typical domestic energy consumption figures,
Factsheet 96, 18/01/11. New typical medium consumption figures 16,500 kWh (Gas) 3,300 kWh (Electricity).

Contact your relationship manager for more information. 

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