External doors are often used as emergency exits which are also burglary retardant in stores, retail shops, function rooms, concert halls, industrial buildings, etc. They can also be used indoors…
Air tightness is a performance feature that guarantees a low leakage rate between two zones subject to different pressures and separated by a door.
Where can air-tight doors be used?
The permeability test may seek to ensure that the building presents a good level of air tightness in order to improve its energy performance (for instance, combined with thermal insulation).
This performance feature can also prove useful in the nuclear or chemicals sector, etc. Certain zones have to be placed under excess pressure to prevent the transfer of dust or particles in neighbouring zones. It is essential to master the leak flow rate from the room and especially the doors and windows for the dimensioning of the HVAC machines.
|European standards||EN 12207
|Pressure on hinge side: up to L4
Pressure on non-hinge side: up to L2
Tests carried out on single and double doors at the CSTC (Technical and Scientific Construction Centre), an accredited laboratory, in accordance with current European standards:
EN 12207: Windows and doors – Airtightness – Classification
EN 1026: Windows and doors – Airtightness – Test method
The standards provide for 4 classes (L1, L2, L3, L4), ranked in order of air tightness, based on:
Class L4 therefore achieves the best air tightness (3 m³/h.m² at 100 Pa).