Non-tightness of cold room walls, measurement of air leakage. Ondichtheden in de wanden van koude ruimten, het meten van luchtlekken.

Describes different goals of air leakage measurement with corresponding measuring methods. Discusses results and experience from measurements carried out with the stationary overpressure method and the non-stationary tracer gas method. Adds working diagrams. Pleads for further standardisation of thespecific equivalent leak opening (SELO) especially of temperature on which it is based. Gives numerical example for calculating the lower limit of admissible non-tightness of cold rooms.