World Championship
for Energy Savings
Championship
What is WCES?
Why it matters
How it works
Methodology
How you become a World Champion
International Sustainable Buildings Competition
Leagues
Explore Leagues
What is a National League
Launch a National League
Champions
Explore Champions
What is a Champion?
Performance categories
Levels of performance
Submission process
Submit Building
Nantes Regional HQ - Building Martin Luther King
France – Nantes
Temperate
Existing Building
Organisation : Orange
40.1 %
annual energy
savings achieved
Level : Master
Energy performance
40.1 %
Energy savings
109.6 kWh/m²/year
Absolute performance
12.8 kgCO₂/m²/year
Carbon intensity
Technical context
Floor area
8,766 m²
Activity type
Office
Building structure status
Tenant
Consumption data
Measurement periods
Reference period
Jan 2022 - Feb 2024
Monitoring period
Jul 2024 - Jun 2025
Annual Energy Impact
Reference
1,525,593 kWh/year
Energy Savings
612,258 kWh
Avoided Emissions
112.53 tCO₂/year
