Windows and doors > Air permeability
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The performance characteristics listed below are relevant to products covered by EN 14351-1 Windows and doors - Product standard, performance characteristics - Part 1: Windows and external pedestrian doorsets without resistance to fire and/or smoke leakage characteristics
This requirement applies to:
| Windows | Yes |
| Doors | Yes |
| Roof windows | Yes |
Doorsets and openable windows with fire resisting and/or smoke control characteristics are covered by EN 14600
Pedestrian doorsets, industrial, commercial, garage doors and windows are covered by prEN 16034 p>
Principles
The window, door or roof window shall prevent excessive passage of air.
The tests for air permeability of screens shall be carried out on the screen or on its individual parts including joints between the individual parts. In the latter case the air permeability of the screen shall be calculated as the sum of the air permeability of the individual parts and the joints.
Standards
| EN 1026 | Windows and doors. Air permeability. Test method |
| EN 12207 | Windows and doors. Air permeability. Classification |
Method of test
The test method is described in EN 1026. The window is mounted on a test box and air leakage is measured for both positive pressure difference (infiltration)and negative pressure difference (Exfiltration).
Classification
The class of performance is given as a number indicating the peak test pressure and air permeability at 100 Pa as listed below:
| Class | Peak test pressure | Air permeability at 100 Pa |
| 0 | Not tested | Not tested |
| 1 | 150 Pa | 50 m3/h/m2 |
| 2 | 300 Pa | 27 m3/h/m2 |
| 3 | 600 Pa | 9 m3/h/m2 |
| 4 | 600 Pa | 3 m3/h/m2 |
CE Marking
UK Regulations make no specific requirements for air permeability of components but a particular whole building air permeability is required:
| Location | npd allowed |
| England and Wales | Probably not |
| Scotland | Probably not |
| Northern Ireland | Probably not |