A strategic energy audit for the company

Energy audit: a strategic tool for companies

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Companies with more than 250 employees or an annual turnover of more than 50 million euros with an annual balance sheet of more than 43 M€ must carry out an energy audit every 4 years. This is the application of the European Energy Efficiency Directive 2012/27/EU, whose French regulations have set the first deadline on 5 December 2015.

Companies that have implemented an ISO 50001-certified energy management system are exempt from this requirement under the certified perimeter.

Of course, the SMEs who are not concerned by the obligation can also benefit from this structured approach.

The advantages of an energy audit

The energy audit is a very useful tool for companies

What is the benefit of the audit?

The energy audit corresponds to a precise survey of the energy consumption of a given entity, followed by recommendations for actions to save energy and the integration of renewable energies that result from it. Beyond its mandatory character, it is a very useful tool to achieve true optimisation of energy efficiency in an approach which is as comprehensive as possible, all while complying with regulations.

An energy audit generates:

  • a detailed vision of the energy consumption of the audited entity (where, how and why is the energy consumed on the site?),
  • a plan of actions which can be acted upon within two to four years.


The perimeter of the energy audit

An energy audit covers at least 80% of the company’s energy bills


What is the perimeter to audit?

Within the perimeter of an energy audit are the usages linked to:

  • the building (lighting, heating, air conditioning),
  • the industrial processes,
  • the fleet of clean vehicles.

The perimeter must cover at least 80% of the company’s energy bills.



The participatory method at the heart of the energy audit

The secret of a successful energy audit: the participatory method

A proven participatory method

At Orygeen we use a participatory method which allows a true transfer of know-how.

We apply the EPS method (‘Energy Potential Scan’), invented in the Netherlands and deployed as part of the branch agreements in Belgium, in accordance with the European norm NF EN 16247 (1 to 4).

This method differs from traditional energy audits because:

  • the consultant, simultaneously the facilitator and catalyst of the technical knowledge within the company, works closely with the internal resources of the audited company,
  • the determination of the energy consumption and optimisation comes from the audited company.

This allows the acquisition of:

  • a true technical quality in the work as it is the internal resources of the audited company who know the installations best and it is they who, led by the consultant, define the figures and generate ideas,
  • a high level of acceptance of retained ideas, which come from within the company and not from an outside source.

The improvement in the energy operation of the company endures beyond the departure of the consultant, as the internal stakeholders remain within the company after the audit mission.

Concretely, Orygeen intervenes in two phases to:

Perform the diagnostic and in-depth analysis of the energy consumption (ECA or Energy Consumption Analysis) in order to obtain a table of consumption for one or more years and define reliable energy performance index

Identify the energy improvement options (Scan’s) and evaluate their economic profitability and their technical feasibility in order to define a plan of action proposed to the audited company

Beyond the mandatory character of the regulatory audit every four years, a systemic diagnosis can clearly be carried out in the companies that are not under constraints to identify the real levers of energy optimisation, and therefore improve their energy performance and so contribute to their environmental objectives.