The members of LIEN, supported by SEAI, work together to improve their energy performance and inspire others to follow.

  • 200

    of Ireland’s largest energy users are members of LIEN
  • 138,000

    people are employed by Network members
  • 21%

    of Ireland's total primary energy requirement is accounted for by LIEN members

Why join LIEN

LIEN members are companies with annual energy bills of €1 million or over. We work with these companies to improve their energy performance and inspire others by sharing their experience.

  • Access to LIEN's energy expertise and knowledge, built up over two decades
  • Reduce your energy costs and greenhouse-gas emissions
  • Maintain robust energy management
  • Boost your reputation for social responsibility and environmental protection
  • Keep up to date on latest technology and supports in energy efficiency and renewable energy
View the LIEN members list

Who can join LIEN

Companies are eligible if they are either spending at least €1 million on energy annually, or are certified to or pursuing ISO 50001 certification. Certain commitments must be fulfilled by companies signing up to LIEN. You must:

  • Develop an energy management programme and action plan
  • Set and review energy targets
  • Report annually on energy performance

We are currently developing a new strategy for the network to build on its reputation as one of the world’s leading energy efficiency networks.

LIEN initiatives and new strategy

View LIEN member results and targets

The total primary energy requirement (TPER) of the network increased marginally to 36,600 GWh in 2017, representing a total estimated energy spend of €1.2 billion. View TPER breakdowns by sector and individual member results and targets.

View Members Results


These guides, developed by special working groups in the large industry energy network, document best practice and introduce techniques for reducing energy use.

Contact us

If you are interested in joining or have any queries about LIEN, please email