Daylight requirements play an essential role in designing healthy, comfortable living environments. Under Bbl Article 4.147, every habitable room must meet specific daylight surface requirements. But checking this manually can be slow, complicated, and prone to mistakes especially on larger or more detailed projects.

To make this easier, we’re introducing the Struck Daylight Check for Revit: a clean, visual, and fully integrated way to validate daylight performance directly inside your BIM model.

With this plugin, you no longer need external tools or manual formulas. Everything happens inside Revit, in a clear workflow that guides you from setup to results in just a few steps.

What the Revit Daylight Check Does
Once installed, the plugin helps you quickly verify whether each habitable room meets the daylight requirements of Bbl Article 4.147.

You can:

✔ Analyse daylight using your existing Revit model

The plugin automatically reads room geometry, window dimensions, and glazing.

✔ Choose whether you want to work with Revit Rooms or Areas

Both modeling approaches are supported.

✔ Select exactly which habitable rooms you want to check

No extra filtering you stay fully in control.

✔ View results clearly in both 2D and 3D

A visual overlay shows where daylight enters the room and how large the effective daylight surface is.

✔ Get a full technical breakdown

Including AE-values, surface calculations, and the alpha (α) and beta (β) angles used in the official formula.
In short: you get clarity, speed, and accuracy all inside Revit.

 How It Works After Installation
The workflow is designed to be simple, even for first-time users:

Step 1:  Set Your Parameters
In the settings window, you can define values such as:

• required daylight percentage

• AE-factor per habitable room

• glass transmittance factor (Cita)

• keywords to detect glazing elements in your model

This ensures the calculation matches your project’s requirements and standards.

Step 2: Choose Your Spatial Type

Depending on how your model is set up, select:

• Rooms
  or

• Areas

The plugin adapts to your modeling method.

Step 3: Select Your Habitable Rooms
Pick the rooms you want to analyse for example, bedrooms, living rooms, or workspaces.
These are the spaces that must meet the daylight requirements.

Step 4: View the Results

Once the check runs, you will see:

Visual

• A sunlight overlay in 2D and 3D

• Clear pass/fail indicators per room

Technical

• AE-values

• required daylight ratio

• total daylight surface

• the α (alpha) and β (beta) angles

• detailed window-by-window breakdown

If needed, you can manually verify each calculation thanks to the full transparency of the formula inputs.

 Where to Get the Plugin
The Revit Daylight Check is available on request.

To receive access and installation instructions, contact:
📧 support@struck.eu

Our team will provide you with everything you need to get started.

What’s Next
We are currently expanding our daylight tools and working on a plugin for NEN-EN 17037, which will offer even more advanced daylight analysis options inside Revit.

 Fast. Clear. Integrated.
The Struck Daylight Check turns a traditionally difficult calculation into a smooth part of your design process.
It saves time, reduces uncertainty, and gives you complete


Here’s a short preview of how the Daylight Check works inside Revit: