Updated 26 September 2026: embedded video, reference models and project resources added.

Watch manufacturing and EI30/EI60 testing

Watch the full video on YouTube

Introduction

Fire-rated vision panels are widely used in fire doors across commercial, healthcare, and infrastructure projects.
However, a common misconception remains:

Passing a fire test does not guarantee consistent performance in real applications.

In practice, the reliability of a vision panel depends on multiple variables — including size, thickness, and glass configuration — especially when integrated into fire door systems.

From Manufacturing to Performance Control

The production of fire-rated vision panels is not just a fabrication process — it is a controlled engineering system.

At Kinguard®, we focus on ensuring:

• Consistent interlayer filling and curing

• Stable bonding between glass layers

• Controlled structural integrity through tempered glass selection

These factors directly influence how the glass behaves under fire exposure, particularly in maintaining insulation and integrity over time.

Why Size, Thickness and Configuration Matter

In fire door applications, vision panels are rarely uniform.

Performance varies significantly depending on:

• Panel size
  Larger panels introduce higher thermal stress and deformation risk

• Glass thickness
  Thinner configurations may pass initial testing but show instability under prolonged exposure

• Glass composition
  Float glass vs tempered glass affects structural response during fire conditions

These variables must be evaluated together — not independently.

EI30 & EI60: Real Fire Testing Validation

To ensure reliable application, vision panels must be validated through real fire testing, not just theoretical design.

In our latest testing program, we evaluated:

• EI30 and EI60 configurations

• Different thickness combinations

• Multiple panel sizes representative of real door applications

The objective is not only to achieve compliance, but to understand:

How performance changes across configurations.

This approach allows us to provide tested and repeatable solutions, rather than generic specifications.

Supporting Fire Door Manufacturers

For fire door manufacturers, selecting the right vision panel is a system-level decision.

At Kinguard®, we support our partners with:

• Vision panel configuration selection

• Thickness and size optimization

• Compatibility with fire door systems

• Test-supported technical recommendations

This ensures that the final product performs reliably — not just in testing, but in real-world applications.

Conclusion

Fire-rated vision panels should not be treated as standard glass products.

They are performance-driven components that require:

• Controlled manufacturing

• Configuration-based evaluation

• Real fire testing validation

Understanding these factors is essential for achieving long-term reliability in fire door systems.

Watch the Full Video

Explore the full process — from manufacturing to EI30 & EI60 fire testing:

https://youtu.be/F0pybxLGMBk

Current website reference models

The following EI30 and EI60 models are reproduced from the KINGUARD Vision Panels page. This table is a product reference, not a list of the specimens shown in the video. Confirm each proposed doorset and glazing configuration against the relevant test evidence.

Reference: KINGUARD Vision Panels, checked 26 September 2026. Final size, thickness and glazing details depend on the applicable doorset and supporting documentation.

Resources for door manufacturers

Download the Product Range Overview (PDF) and Enquiry Checklist (PDF). Include your door construction, glazing pocket details, panel dimensions, quantity, project standard and timetable when requesting configuration support.

For further reading, see Beyond Fire Rating: What Defines a Reliable Fire Door Vision Panel.