The world’s greenest data centre

Data centres Solutions
A data centre consumes large amounts of energy, both for operation and for cooling.
The demand for secure and green data centres is growing along with national and international environmental requirements.

The world’s greenest data centre is being built on Rennesøy, north of Stavanger.
Running a data centre is very energy-intensive. The IT industry accounts for 2% of the world’s CO2 emissions. Green Mountain has 30-40% lower operating costs compared to the general level. The project is housed in a former NATO facility on Rennesøy in Rogaland, with around 21,000 m² of floor area inside the mountain.

The facility has been laser-scanned and modelled in 3D. This is essential to planning and coordinating all of the infrastructure. The cooling needs of the computer rooms are covered by free cooling from seawater. The underground complex is well suited for the use of inert air for fire safety.
The facility is considered to be the world’s greenest data centre and meets very high standards of energy efficiency.

The Green Mountain Data Centre has been shortlisted for the ‘Sustainability Champions Award’ and ‘Sustainability Design Project of the Year’.
COWI has been involved in planning and monitoring construction phase 2.


Rennesøy, Norway

2013 - 2016

Green Mountain Datacentre AS


  • Construction
  • HVAC
  • Electrical
  • Fire safety
  • H&S
  • Geological assessment

Get in contact

Sverre Inge Heimdal
Project Manager
Buildings Central North, Norway

Tel: +47 926 06 502