Heat consumption benchmark for Geneva's industrial buildings
ThermoGeneva compares the official heat consumption index (IDC) of every building in Geneva's industrial zones with buildings of the same type across the canton. In one view you see whether a building's heating and hot-water consumption is lower, typical or higher than its peers, how it has changed over three years and how it relates to Geneva's legal thresholds.
Based on each building's latest declaration, the 784 buildings with an IDC in Geneva's industrial zones have a median of 372 MJ/m² per year. 268 of them have a 3-year average above 450 MJ/m², the level from which Geneva's energy regulation requires improvement measures.
What ThermoGeneva answers
- What is the IDC of this building?
- Is it lower or higher than similar buildings in Geneva?
- Is its heat consumption improving or getting worse?
- How close is it to Geneva's legal IDC thresholds?
How it works
- Official IDC declarations are downloaded from the SITG open-data portal.
- Each building is placed in its FTI industrial zone and grouped with buildings of the same type across the canton.
- The site calculates the peer median, percentile, 3-year trend and estimated energy for every building.
What it is not
ThermoGeneva does not measure process energy or a factory's total consumption, and it does not replace an energy audit. It is a screening layer built on public data that shows where a closer technical look may be worthwhile.
Frequently asked questions
What is the IDC (indice de dépense de chaleur) in Geneva?
The IDC is the official Geneva indicator of a building's heat consumption. It is the final energy used for space heating and domestic hot water, divided by the heated floor area (SRE) and corrected for the severity of each winter. It is expressed in MJ/m² per year (3.6 MJ = 1 kWh) and declared every year by building owners, one value per building (EGID).
What IDC value is considered high in Geneva?
Geneva's energy regulation uses the average IDC of the last three years. Above 450 MJ/m² per year, owners must take measures to reduce consumption. Above the 'significant' threshold, an energy renovation is mandatory: 800 MJ/m² until the end of 2026, 650 MJ/m² from 2027 and 550 MJ/m² from 2031.
How does ThermoGeneva compare buildings?
Each building is compared with all buildings of the same type (for example industrial, logistics or offices) in the canton of Geneva for the same year. The site shows the peer median, the difference in percent and the percentile. When a peer group has fewer than 10 buildings, no benchmark is shown.
Which buildings are included?
ThermoGeneva shows buildings located in the industrial zones managed by the Fondation pour les terrains industriels de Genève (FTI) that declare an IDC. Benchmarks are calculated against all buildings of the same type in the canton.
Where does the data come from and how often is it updated?
All data is official open data: the IDC dataset of the cantonal energy office (OCEN) and the FTI industrial-zone perimeters published by SITG, plus canton boundaries from swisstopo. The data is refreshed from the official sources, and the date of the last update is shown on every page.
Is ThermoGeneva an energy audit or an official decision?
No. ThermoGeneva is an independent, indicative screening tool. A high value is a reason to look closer, not a verdict. Only the cantonal energy office (OCEN) determines legal obligations, and only an energy audit can assess a specific building.