NEN EN 13141-1 : 2004

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Performance testing of aerodynamic characteristics
  4.1 Flowrate/pressure
  4.2 Non-reverse flow ability
  4.3 Air tightness when closed (for closeable externally mounted
      air transfer device)
  4.4 Geometrical free area
  4.5 Air diffusion in the occupied zone
5 Performance testing of sound insulation
6 Performance testing of water tightness
  6.1 Principle
  6.2 Test installation and conditions
  6.3 Test procedure
  6.4 Test report
Annex A (informative) Method for calculation of the equivalent area
Bibliography

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 devices with fixed openings, manually adjustable openings, pressure difference controlled openings and designed to act as an air transfer device.