Knowledge base
Sun paths, comfort criteria, KPIs and the models. Model validation is in Products.
Simulation Engine Basics
What Infrared Core computes, how the wind, sun and heat models work, why a run takes seconds, and how the results are tested against measurements and reference tools.
30 Oct 2026 · 10 min read
New engine
Advanced thermal comfort: how Infrared Core computes the heat people feel
One hot afternoon in a Vienna courtyard shows what Infrared Core computes for every square metre: sun and shade, hot walls, trees, water and wind, combined into the heat people actually feel.
29 Oct 2026
Lawson, Davenport and NEN 8100 Wind Comfort Criteria
This report provides a comprehensive overview of pedestrian wind comfort criteria used worldwide. It examines the core principles and engineering approaches behind each framework, compares quantitative thresholds, and outlines regions where wind comfort assessments are mandatory in building permit processes.
13 Jul 2025 · 7 min read
About Sun Paths
How to read a sun path diagram: sun altitude and azimuth, orthographic and stereographic projections, solar charts and analemmas, and how designers use them for shade, daylight and solar studies.
30 Oct 2026 · 5 min read
Key Performance Indicators
Learn how to interpret KPIs from environmental simulation models. These metrics offer critical insights into thermal comfort, energy efficiency, and climate resilience, helping you make data-driven decisions for sustainable built environments.
17 Jul 2025 · 15 min read
Sigmoid KPI Curve
Sigmoid functions enhance environmental KPIs by modeling the non-linear relationship between thermal conditions and human comfort. This article explains their scientific basis and practical application in PMV models for accurate urban design evaluation.
11 Sept 2025 · 2 min read