Customer case · Basel
Eisenbahnweg Basel: up to 27% less heating energy in a new residential development
Eisenbahnweg residential development, Basel-Hirzbrunnen · Buchner Bründler Architekten
Heating energy saved
Rental apartments
Building completion
Investment payback
Customer portfolio already using ECCO2
At the new Eisenbahnweg development in Basel-Hirzbrunnen, ECCO2 demonstrated that even well-insulated buildings can have untapped efficiency potential.
“Up to a 27% reduction at the Eisenbahnweg residential development – this and other successful pilot projects prompted us to roll out the solution to additional developments. The solution is now already in use across two-thirds of our entire portfolio.”
Frank Dietler
Case · all heating seasons
Well insulated does not automatically mean efficient.
Modern new buildings such as Eisenbahnweg are well insulated. That is precisely what makes heating control demanding: thermal inertia, changing occupancy, and seasonal fluctuations can lead to unnecessary energy consumption without active control, directly increasing tenants’ ancillary costs.
The customer set clear requirements for the solution: no permanent structural interventions in the apartments, full operational transparency, and an approach that could scale across additional properties.
A compact gateway in the boiler room connects the heating control system to temperature measurements and incorporates site-specific weather forecasts. Based on this data, NARA AI automatically optimizes the supply temperature and continuously refines the building model throughout the heating season. Optimization is fully automated; parameters can be adjusted remotely when needed.
Operational data has since been available in real time through ECCO2 Cumulus Cloud, including automatic alerts for anomalies such as elevated water temperatures, heating outages, or incorrect controller settings.
The property
Eisenbahnweg residential development, Basel-Hirzbrunnen.
- Location: Eisenbahnweg, Hirzbrunnen district, Basel
- Architecture: Buchner Bründler Architekten
- Completion: 2023
- Building type: 12-story high-rise with annex
- Use: 185 mid-market rental apartments, café, shared spaces, underground parking with approximately 450 spaces
- Facade: Greenish clinker-brick volume shielding the landscaped courtyard from rail and road noise
- Outdoor space: Landscaped courtyard, apartments spanning the building depth with balconies, some with views of the Rhine
- Link: bbarc.ch/wohnhaus-eisenbahnweg
From one building to a portfolio standard
The savings benefit tenants.
“Up to a 27% reduction at the Eisenbahnweg residential development – this and other successful pilot projects prompted us to roll out the solution to additional developments. The solution is now already in use across two-thirds of our entire portfolio.”
CO₂ reduction · before and after ECCO2
Eisenbahnweg proves it.
“For us, ECCO2 is not a nice-to-have – it is a core part of our ESG strategy. The savings are real, and the effort is minimal.”
“For us, ECCO2 is not a nice-to-have – it is a core part of our ESG strategy. The savings are real, and the effort is minimal.”
— Luc Weiss, Asset Manager Real Estate Direct, Swiss Finance & Property Group
ESG & regulation · ready to use
Certified, auditable, and transparent savings.
The tons of CO₂ avoided each year are fully documented using the certified FOEN methodology and can be fed directly into GRESB ratings, CO₂ reporting under the Swiss CO₂ Act, and Science Based Targets (SBTi). The analyses are available at the push of a button.
- FOEN-certified
- GRESB-ready
- Swiss CO₂ Act
- SBTi-compatible
- Auditable
- Solar Impulse Label
Sources: ECCO2 Eisenbahnweg customer case factsheet (2024/25 heating season); ECCO2 blog posts “27 % Heizenergie eingespart – Rimobas × ECCO2” and “27 % Heizkostenreduktion – ECCO2 bei der Überbauung Eisenbahnweg Basel,” June 2025.
