Good practice

Regulating room temperatures saves conference centre thousands a year

Regulating room temperatures saves conference centre thousands a year
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All sectors, Office and administration
Annual saving:
Payback time:
0 Year(s)
Resource savings: Energy:
38 000 kWh electricity 89 000 kWh district heat network
Co2 emission reduction:
24.2 tonnes CO2 per year
Premises and operation areas:
Office building
Size of company:
Medium (less than 250)
Advancement in applying resource efficiency measures:
One off investment:

Protocol for power-saving proves successful

  • Regulated room temperature saves vast sums of electricity
  • No investment cost, but € 9 700 in annual power savings 
  • Reduces CO2 emissions by 24.2 tonnes annually

The Nantes Conference Centre ('The City') in France, a public building, requested an energy audit to understand what actions it could take to save energy and reduce its annual power bills.

It found that heating, cooling and ventillation accounted for 85 % of its electricity bill. The audit revealed a lack of defined rules and protocols for optimising indoor temperature. On average, rooms were between 21°C and 24°C regardless of the season. The City needed to establish consistent ambient temperature levels based on seasons and needs.

A new thermostat policy across the entire site set the temperature at 20°C in winter and 25°C in summer. A communication campaign was carried out to raise staff awareness of these actions, emphasising that the new settings do not affect comfort and well-being.

Key benefits

Following the expert recommendations, The City was able to introduce a relative simple measure, at no added cost, which combined with awareness-raising efforts, has helped to reduce its energy consumption and save € 9 700 per year on electricity and heating.

The City is also considering installing automatic doors with presence detection, which will help to limit hot and cold air loss before, during and after events.


 "The energy consumption of the city of Nantes is intrinsically linked to air-conditioning and ambient temperature, which represents nearly 85 % of the total energy bill. We have identified simple energy-saving actions that require no investment." - Mr Caille, Deputy Managing Director, The City

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