This document gives guidelines to correct the measured air flow rate when measuring conditions are different from standard conditions.

It applies to a power-law formula giving the air flow rate as a function of a pressure difference with an air flow rate coefficient, C, varying with temperature and pressure.

This document applies to:

This document is applicable to (but not limited to):

— EN 1507, Ventilation for buildings — Sheet metal air ducts with rectangular section — Requirements for strength and leakage;

— EN 1751, Ventilation for buildings — Air terminal devices — Aerodynamic testing of damper and valves;

— EN 12237, Ventilation for buildings — Ductwork — Strength and leakage of circular sheet metal ducts;

— EN 13141‑1, Ventilation for buildings — Performance testing of components/products for residential ventilation — Part 1: Externally and internally mounted air transfer devices;

— EN 13141‑2, Ventilation for buildings — Performance testing of components/products for residential ventilation — Part 2: Exhaust and supply air terminal devices;

— EN 13141‑9, Ventilation for buildings — Performance testing of components/products for residential ventilation — Part 9: externally mounted humidity controlled air transfer device;

— EN 13141‑10, Ventilation for buildings — Performance testing of components/products for residential ventilation — Part 10: humidity controlled extract air terminal device;

— EN 15727, Ventilation for buildings — Ducts and ductwork components, leakage classification and testing.

This document does not apply to: