scope:

This European Standard specifies laboratory methods for testing externally and internally mounted air transfer devices operating under pressure differences. It applies to devices located between two spaces (between one room and outside, or between two rooms) of the following types: - devices with fixed opening(s); - devices with manually adjustable opening(s); - devices with pressure difference controlled opening(s); - window openings specifically designed to act as an air transfer device. It describes tests intended to characterise the following: - flowrate/pressure; - non-reverse flow ability; - 'air tightness when closed' (for closeable externally mounted air transfer device); - geometrical free area; - air diffusion in the occupied zone; - sound insulation; - water tightness. This standard does not apply to evaluation of: - air filtration; - condensation risk; - noise production.