Keysource Blog


May 11, 2021 9:44:39 AM


At Keysource we adopted the PUE metric in 2007, as members of the green grid. Since then, the metric has been used to help our customers consider options when designing new facilities and benchmark opportunities within existing live environments. In response to an evolving sustainability landscape and regulation requirements, Keysource designed its Energy Optimisation Study (EOS) in 2020 to help companies optimise the energy efficiency of their data centres, saving them money and reducing their carbon.

 In addition, EOS provides relevant and accurate data that can be used for mandatory regulatory reporting requirements such as Streamlined Energy and Carbon Reporting (SECR) and helps companies to avoid costly penalties. It is completely non-intrusive and has an important commercial focus to ensure opportunities can be easily understood and approved with a robust business case, often identifying opportunities with a Return on investment (ROI) of under six months.

Click here to download a copy of the brochure

 How does it Work?

The Data Centre sector accounts for between 1-2% of all global electricity usage, with this only set to grow, and more of a focus for operators to reduce their carbon footprint. However, sometimes, the risk of impacting company brand, reputation or commercial penalties can be too high to implement any change for efficiency gain, if not carried out in the right way.

EOS has been undertaken for multiple existing and new clients since its inception. In simple terms we gain deep understanding of what the facility looks like, how it operates and its immediate and future requirements. Once complete we look at key wins for efficiency, lower operational cost and reduction of carbon. Given the business-critical nature of the environments, any opportunities must present zero or acceptably low risk and not compromise the operation and resilience of the facility, both during and post any change.

The study scope ranges subject to customers’ ability to influence or change, however common activities include:

  • A Cooling redundancy and technology assessment,
  • An understanding of cooling controls,
  • UPS topology, efficiency, and settings,
  • Airflow management review
  • Best practice assessments. 


The Keysource EOS benefits the customer with a level of detail which clearly presents the implementation plan, along with any associated risk and dependencies. This provides important operational comfort that compelling numbers are backed up by real feasible plans. Overall, we have saved businesses on average 14% on carbon emissions and ongoing power costs through this service alone in a mix of small/medium facilities to multi megawatt colocation facilities.

Customer Case Study

One of our first clients was a leading global platform provider for centres of data exchange, interconnection, and colocation solutions who appointed us to undertake an EOS to understand the opportunities for optimising a Data Hall for a key client, with the objective of reducing total power consumption and operational expenditure.

The EOS survey was undertaken in two phases.  Phase One included us undertaking an assessment and identifying/quantifying opportunities for customer consideration. This included a number of opportunities across the infrastructure which equated to 20% - 30% operating efficiency savings. For Phase Two we produced planning documentation, for customer and operator approval, and implemented changes including validation reporting. Importantly this phase demonstrated that the changes would be made without risk to the availability or resilience levels.

Following the implementation phase additional performance measures were made which confirmed the energy optimisation achieved a reduction of circa 100 kW of power equivalent to 876,000.00 kWh/year in energy and savings £10,800 per month.


 “The Keysource Energy Optimisation Service has provided a detailed view of what is possible with regards to energy savings in a number of our client halls. Through the execution of this optimisation we expect to see significant savings of around 15% of Operating costs, carbon emissions and energy. “

Data Centre Manager, leading global platform provider for centres of data exchange, interconnection, and colocation solutions

 Click here to download a copy of the brochure


Topics: Energy Consumption, Environment, Sustainability

Richard Clifford

Written by Richard Clifford

Richard has extensive experience in delivering strategic client engagements, from design to operation of Critical Environments. Championing Innovation, Richard is instrumental in driving value for our clients, evidenced by some of our most pioneering and award winning projects and solutions.