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Energy audit of ITES

  • Energy audit
  • Education
Audit énergétique de l'ITES

ITES (training center for educational and social work)

The client’s objectives and expectations

The objectives of the energy audit are as follows: to reduce energy needs and bills, eliminate issues of discomfort in winter and summer, and meet the targets of the Tertiary Decree. This decree applies to tertiary buildings with a surface area greater than 1,000 m² and requires a reduction in energy consumption of 40% by 2030, 50% by 2040, and 60% by 2050.

Our main tasks

Analysis of the existing building and its energy consumption to create a computer model close to reality. The energy model makes it possible to identify the various potential improvement options for the building and the expected energy and economic savings.

Évaluation énergétique de l'ITES

Project characteristics

  • Institution: Hosts 255 students and 30 staff members,
  • Use: Open Monday to Friday from 8 a.m. to 6 p.m. and Saturday from 8 a.m. to 12 p.m., closed 4 weeks per year,
  • Equipment: Two high-efficiency gas boilers (290 kW) and several ventilation systems,
  • Problems: Feeling of heat on the 1st and 2nd floors. Feeling of cold caused by poor building airtightness,
  • Energy consumption: Annual average of 304.9 MWh for natural gas and 84.9 MWh for electricity.

Proposal

The study showed a very accurate modeling with only a 1.9% deviation compared to billed consumption. Three renovation scenarios were presented:

  • Scenario 1: Light renovation work (replacement of lighting fixtures, improvement of control systems, etc.), this scenario offers low energy savings (3%) for an investment cost of 17,000 euros.
  • Scenario 2: Complete renovation without replacing the boilers, offering 50% energy savings and a payback period of 20 years with subsidies.
  • Scenario 3: Complete renovation with replacement of boilers by air-to-water heat pumps, allowing for 72% energy savings and a payback period of 24 years with subsidies. This scenario meets the objectives of the Tertiary Decree, eliminates winter discomfort issues, and significantly reduces summer discomfort problems.

I am particularly concerned with the steps to improve energy efficiency in the offices. As a team manager, I ensure the overall comfort of the staff.

ITES