As far as natural draught systems are concerned, passive type measure, it has been proven that sump placed in centered position in relation to ground floor, has the highest catchment capacity 6 European Commission as of February 21, 1990, 90/143/ EURATOM than external sump.
En cuanto a los sistemas de extracción natural, medida de tipo pasivo, se ha comprobado que la arqueta situada de forma centrada conforme a la planta, tiene una capacidad de captación mayor que la colocada por el exterior.