Daylight Lab is a building-physics practice. We model daylight, energy and airflow for architects and engineers. We also build open-source tools that let AI run simulation engines.
Turn the wind. Streets that line up with it carry more air.
Design teams decide window sizes, shading and room depths early, often by rule of thumb. Those choices fix a building’s energy use and comfort for decades.
We test those choices with physics-based simulation while they are still cheap to change. You get clear numbers, plots and a recommendation you can act on.
Wind
It starts with the city: green corridors let the wind cool the streets.
CFD & microclimateOutdoor comfort · UTCI
We map the felt temperature where people walk and wait.
CFD & microclimateShading · Solar gain
Louvres keep it off the glass, and still let the low winter sun in.
Building energyIlluminance · Visual comfort
We map how far daylight reaches, and when the sun causes glare.
Daylight & lightingSimulation studies for new buildings and retrofits, from concept to certification.
Climate-based daylight modelling, daylight factor, sDA and ASE, glare and EN 17037 checks. Artificial lighting layouts and controls.
Radiance, Daysim, ClimateStudio, DIALux, Relux
Spectral simulation of melanopic EDI and alpha-opic metrics to CIE S 026, balanced against glare and energy use.
Lark Spectral, Radiance
Whole-building energy models to compare design options, plan retrofits and show nZEB or code compliance.
EnergyPlus, OpenStudio, DesignBuilder, Honeybee (Ladybug Tools)
Indoor airflow, ventilation and heat transfer. Outdoor comfort in streets, squares and courtyards.
OpenFOAM, ENVI-met, SimScale
Daylight, views and lighting calculations for LEED, WELL, BREEAM and DGNB, documented for submission.
LEED, WELL, BREEAM, DGNB
Postgraduate teaching and hands-on training for design teams in lighting measurement and simulation.
Hellenic Open University
We integrate custom AI solutions into your workflows. AI assistants connect to the simulation tools you already use, so they can set up models, run studies and draft reports.
Anthropic (Claude), OpenAI (ChatGPT), Google (Gemini), MCP, Skills, Python
We agree the questions, metrics and standard. Then we build the model from your drawings.
We run the simulations and test the design options you care about, side by side.
You get plots, numbers and a clear recommendation. We stay on call as the design changes.
Pick a day and an hour. See where the sun sits over Syntagma Square, and where the shadows of the real buildings fall.
The map uses the sun-path chart that designers read every day. Rings show the sun’s height. Curves show its path on the 21st of each month. Dotted lines mark the solar hours.
Buildings © OpenStreetMap contributors. Some heights are estimated.
Drag the sun along its path, or use the sliders. Shadows fall from the real buildings around Syntagma Square.
Move the sun, or play a day. With daylight-linked control, each lamp dims when its zone has enough daylight.
Open source
Our MCP servers let assistants such as Claude run Radiance on your own models. Your model stays on your machine.
Well-designed façades carry sunlight beyond the usual daylit zone of deep offices. Good design lights more of the floor than rules of thumb suggest.
More daylight cuts lighting energy but can raise cooling loads. We simulate both together, with climate-based models.
Light sets our body clock. We measure melanopic light and glare, not only lux on a desk.
Current research, 2026–2029
A Hellenic Open University project on human-centric lighting. We run high-resolution spectral simulations to quantify melanopic EDI, and balance it against glare, vertical illuminance and energy use under WELL, LEED, BREEAM and DGNB.
Mechanical engineer with a PhD in daylighting and more than 15 years in sustainable building design, energy simulation and emissions reduction.
I teach building lighting measurement and analysis on the postgraduate Sustainable Interior Design programme at the Hellenic Open University. I lead emission reduction work in the gas distribution sector. Daylight Lab is where I take on simulation studies and publish open-source tools.
Send drawings or a short description. We reply within two working days with questions and a fee estimate.