New insights concerning air tightness of cold rooms. Nieuwe inzichten over de lekdichtheid van gekoelde ruimten.

Reports insights from research project "Optimalisatie koelhuisbouw" (Optimisation of cold store buildings) by the Delft Technical University for the Foundation for Cooling Technique Development. Pleads for standardisation of the maximum admissible heat gain by air leakage and yearly averaged pressure differences between the cold room and its surroundings. Gives some numerical examples. Uses theory of specific equivalent leak opening.