Energy efficiency at maximum potential
There are many buildings in the non-commercial sector: public and private administration, education, places of worrship, social action. At SILENO, we prefer to take to set aside the health sector, which has certain particularities in terms of energy efficiency. There are several million employees working in offices and it can be estimated that this represents around 25% of the total electricity consumption of the tertiary sector. According to the French agency of ADEME:
• Heating accounts for 50% of energy consumption in the office;
• The lighting of the premises corresponds to 20% of the total energy bill.And as in the other buildings:
• Reducing temperatures by 1°C can reduce energy consumption by up to 8%
• 20% of the energy distributed is the observed average energy waste
But moreover:
• More than 70% of indoor lighting consumption in buildings is done during the day (Source AFE.fr) because there are still few systems linked to presence detection or natural light
• The night lighting of buildings represents 15 to 30% of direct losses
• The vacancy rate for business premises has risen sharply in recent years with, for example: from 4.8% to 7.4% in one year in the business district of La Défense (source “La ville unoccupée” by N. Arab & Y. Miot – Presses de l’école nationale des Ponts et Chaussées-France).
With these impressive figures, we can think that the majority of these energy losses could be reduced by respecting internal regulations, discipline for everyone, but it is necessary to have detection tools to allow both:
– Identify consumption and correlate this data with the control of the use of the premises to verify that all consumption corresponds to the use of the place
– To respect the rules of energy efficiency and not to reduce the quality of service, the comfort of use of the premises for its occupants