Campaign for Accurate Simulation of Shading (CASS)

Overheating in new buildings is a growing challenge. Larger glazing areas, higher insulation levels, and rising temperatures mean that solar gains can quickly push indoor conditions beyond comfort limits.

When faced with potential overheating, you rely on simulation tools to guide your design decisions. But shading is often simplified or ignored, leading to conflicting advice.

Downloads

Find out more information by downloading these documents.

What will you believe?

Your building simulation model that tells you that you do not need shading…

or

A solar shading expert who says that you will.

Software Screenshot
You would trust the internationally respected software
EXCEPT
Modelling Reality

Why shading is often modelled incorrectly

Many simulation tools rely on simplified assumptions. They may ignore dynamic behaviour, use generic g‑values, or fail to account for geometry, orientation, or control strategies.

Shading Modelling

How the ES‑SO Database supports CASS

The ES‑SO Database provides verified, standardised performance data for shading products. This ensures that shading is modelled accurately, consistently, and transparently.

Database

What accurate shading simulation can achieve

Using real product data can reduce solar gains by up to 60%, cut cooling loads by 20–40%, and significantly reduce overheating hours.

Simulation Results

Downloads

Find out more information by downloading these documents.