DIN EN 1121:2000-09

The document specifies the method to be used for testing door leaves and doorsets between two different climates. The test is carried out by subjecting the doors to two different climates on either side for a period of time, and measuring the resulting bow of the longitudinal lock side edge at stages of the test. If required, the operating forces and the air permeability of the doors in their deformed state are also determined.