*CEA-4 is an urban building energy modelling (UBEM) tool developed by such world-leading research institutions as ETH Zurich in Switzerland and Future Cities Laboratory in Singapore.
3,000+ users in over 75 countries download and use CEA for urban decarbonisation since 2023.
Urban design.
Decarbonised.
Delivered - with ease.
Whether you're an urban designer, educator, researcher, or public planner - we have a tailored solution to support your urban decarbonisation journey.
Slide left to reveal a low-carbon urban quarter powered by a
district energy system.
CEA-4 helps you design it.
The CEA Experiences
We look forward to seeing and applying the upgraded CEA in the upcoming term in the teaching modules of our programme.
We applied CEA in a recent urban decarbonisation design competition in China. Data collection was seamless, and results were available almost instantly - enabling rapid, quantitative comparison of design scenarios.
CEA has been a fantastic tool for research and teaching purposes - serving my team and class.
The Latest
Science-backed energy validation in action across 75+ countries.
National Infrastructure Decarbonisation
The findings establish a data-driven foundation for new municipal planning policies, serving as the blueprint for upcoming national capacity-building programmes for city planners. Works carried out includes formulation of local database, data calibration using measured data, CEA district cooling design and assessment.
Urban Densification & Decarbonisation Trade-off Study
The study validates CEA’s capacity to simulate the complex interplays between block typology (form), density, and Net-Zero targets. This methodology allows developers and city planners to prove the environmental feasibility of high-density projects during the earliest design stages.
Read Peer-Reviewed Paper →
Swiss Pavilion: World Expo 2025
Currently empowering professionals across 75+ countries, CEA-4 remains at the forefront of the science-driven transition to carbon-neutral cities.
Visit Exhibition Details →
CEA at Shanghai Climate Week & ECADI Strategic Partnership
A formal MoU between the CEA Team at ETH Zurich and ECADI promotes CEA through Shanghai-based case studies, integrating the platform directly into their professional design products and high-density workflows.
Future-proof insights made fast & easy
From simulation to solution: CEA-4 Pro transforms complex energy and climate simulations into actionable design insights, helping you future-proof urban developments with confidence.
Cloud computing
No need for high-spec machines - simulations run in the cloud.
Interactive 3D visualisation
Understand urban energy dynamics in a way that's intuitive and persuasive.
Automated workflow
Upload your data, select your scenario, and let CEA-4 Pro do the rest. Saves days of manual setup.
Customisation & support
Tailor feature sets, integrate into your design flow, or work with our team on project-specific needs.
Auto-generated reports
Clean, legible design outputs and insights ready for stakeholders and clients.
Actionable urban design insights
For BIPV, where should PV panels be?
For regeneration
projects, which buildings to retrofit (first) or demolish?
Fast district energy optimisation
Which buildings should be connected to a district thermal network, when minimising costs, emissions, and heat causing urban heat island effects?
Teaching and curriculum development
Used in ETH, Tongji, NUS — plug and play in urban design studios.
Future Climate Scenario Simulation
Forecast building energy demand and emissions under projected climate conditions.
Select the partnership level that matches your project goals.
Whether you are winning a global design competition or planning
a carbon-neutral district, we ensure your vision is technically
sound.
Need something different? Just get in touch.
Are you a student, or teaching using CEA-4?
We have secured some grants to support you using CEA-4 Pro with cloud computing for academic purposes.
Need something different? We’ll tailor a custom plan for you - just get in touch.
Frequently asked questions
Explore our frequently asked questions to learn more about uuen Company, CEA-4, our services and the pricing.
Our team created the uuen services around the open-source City Energy Analyst (CEA). Each of us comes directly from the CEA Team and continues to hold dual roles in both teams. Through uuen, we’re building a sustainable business model that supports CEA’s ongoing development and expands its real-world impact.
More than just a technology provider, uuen exists to bridge a decade of research and teaching on energy-driven urban design, architecture, and building systems into practical tools and services for decarbonising cities.