Learn what it is, how it is measured according to the EN 12207 standard, and why it is a critical quality indicator for windows, doors, and buildings.
Introduction
Air permeability is one of the most important performance indicators for windows, doors, and structural building elements. At a time when energy efficiency, comfort, and sustainability are key priorities, understanding air permeability is essential for both professionals and property owners.
What Is Air Permeability According to EN 12207?
Air permeability refers to the amount of air that passes through a window, door, or structural element when a specific pressure difference is applied.
The European standard EN 12207 defines the method for measuring and classifying this air leakage, ensuring comparable and reliable results throughout Europe.
Why Is It Important?
- Reduces energy losses
- Improves thermal and acoustic comfort
- Contributes to the long-term durability of windows and doors
The European Standard EN 12207
EN 12207 applies to:
- Windows
- Doors
- Balcony doors
The test is carried out under laboratory conditions with controlled air pressure. The results are expressed in classes, ranging from low to high performance.
Air Permeability Classes According to EN 12207
The classes of the standard are:
| Class | Performance Level | Characteristics |
|---|---|---|
| Class 0 | Unclassified | Does not meet the requirements |
| Class 1 | Low | Basic protection |
| Class 2 | Moderate | Everyday use |
| Class 3 | High | Good air tightness |
| Class 4 | Very High | Excellent air tightness |
Modern energy-efficient buildings usually aim for Class 3 or Class 4.
Benefits of High Air Tightness
Choosing windows and doors with a high EN 12207 class offers:
- Energy savings and lower utility bills
- Stable indoor temperature
- Noise reduction
- Environmental sustainability
- Increased property value
How to Choose the Right Window or Door System
When making your selection, take into account:
- The climatic conditions of the area
- The noise level
- The building’s energy requirements
A product certified according to the EN 12207 standard, such as TEHNi doors, is a safe investment.
Frequently Asked Questions (FAQs)
What does air permeability mean in windows and doors?
It is the amount of air that passes through a window or door under pressure.
What is the best EN 12207 class?
Class 4 offers the highest level of air tightness.
Does it affect energy performance?
Yes, directly. Fewer air leaks mean lower energy losses.
Is EN 12207 mandatory?
It is not always mandatory, but it is a strong quality criterion.
Does it apply to all windows and doors?
It applies mainly to windows and doors.
Where can I find more information?
On the official website of European standardization: https://www.cen.eu
Conclusion
Air permeability according to EN 12207 is not simply a technical detail. It is a decisive factor for comfort, energy savings, and quality of life. By investing in certified windows and doors, you ensure an efficient and sustainable building for the present and the future.
All TEHNi doors have certified measurements from official European institutes for air permeability, reducing energy losses and improving thermal and acoustic comfort.
