*CEA-4 is an urban building energy modelling (UBEM) tool developed by such world-leading research institutions as ETH Zurich in🇨ðŸ‡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.
Take action today to design cities for decarbonisation
-
with us.
Contact us
Instant Access
Begin exploring CEA-4's full suite of core and pro features and cloud computing immediately for free.
Customisable Service Plans
From computing power to custom features, we offer flexible service packages to match your project needs.
Dedicated Support
Our team is here to help you choose the right service package and guide you through a smooth onboarding experience.
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.
Choose the plan that suits you
Simple pricing. No hidden fees.
Need something different? We’ll tailor a custom plan for you - 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.