Enabling Better Buildings
We are dedicated to using building science know-how to improve building quality, enhance occupant well-being, and reduce greenhouse gas emissions.
What Drives Us
We believe that integrating building science know-how in the building design and operation phases can significantly improve occupant health and well-being alongside building quality while enabling buildings to contribute to reduce greenhouse gas emissions.
Better Buildings
Improving health, comfort and sustainability of buildings
Zero Carbon
Fostering environmentally responsible building practices and technologies
Integrity
Cultivating a culture of transparency and honesty in all our actions and decisions
Our Products
Professional-grade building physics simulation tools powered by proven WUFI® technology, now in the cloud
C3RRO Plus
Dynamic hygrothermal building simulation for energy efficiency and moisture control
- Cloud-based simulation - no installation required
- Coupled heat & moisture transport
- Based on proven WUFI Plus technology
C3RRO Passive
Passive House and Phius certification software for ultra-low energy buildings
- Phius 2021 certification support
- Based on WUFI Passive
- Automated compliance checking
C3RRO API
Building simulation at scale - integrate hygrothermal calculations into your workflow
- RESTful API with JSON responses
- Automate thousands of simulations
- Python & JavaScript SDKs
All products include a 14-day free trial - no credit card required
View All ProductsWhy Choose C3RRO?
Built by building physicists, for building professionals
Cloud-Based
Access from anywhere, on any device. No installation or updates required.
Proven Technology
Based on WUFI - trusted by thousands of professionals worldwide for decades.
Research-Backed
Developed by former Fraunhofer Institute researchers with PhD-level expertise.
Standards Compliant
ISO 13788, ISO 15026, EN 15026, ASHRAE 160, Phius 2021 certified.
Comprehensive Support
Extensive documentation, video tutorials, and expert technical support.
Always Improving
Regular updates with new features based on user feedback and latest research.
Our Story
At C3rro (pronounced "zero"), our story began with our extensive experience in developing some of the world-renowned WUFI products, including WUFI Plus, the hygrothermal building simulation tool, and WUFI Passive, the building energy certification software.
Our work at the Fraunhofer Institute for Building Physics made us realize the importance of bringing these tools out of the research environment and into practical, modern solutions to get the next generation of these powerful building science tools into the hands of those who can best use them to create sustainable, healthy, and efficient buildings.
The name C3rro represents our core services - Coding, Computing, and Consulting. With these services, we aim to help build a zero-carbon future, where buildings consume zero energy, with zero durability, comfort, or air quality issues.
As a Bavarian company, we draw inspiration from the white and blue C3rrocumulus sky and bring "moisture (simulation) into the cloud" through cloud-powered hygrothermal simulation. Our goal is to unleash the full potential of hygrothermal building simulation and contribute to a better, more sustainable built environment.
Ready to get started?
Start using C3RRO today
Join leading architects and energy consultants using C3RRO for sustainable building design.