ISO 5220:1981
Air distribution and air diffusion — Aerodynamic testing and rating of constant and variable dual or single duct boxes and single duct units
Reference number
ISO 5220:1981
Edition 1
ISO 5220:1981
Withdrawn (Edition 1, 1981)
This standard has 1 amendment.


Specifies methods for the aerodynamic testing and rating of assemblies suitable for use with air distribution systems operating at high or low velocity and high or low pressure. The tests cover: a) leakage past a closed valve; b) casing leakage; c) characteristics of the constant or variable flow rate controller; d) degree of temperature mixing achieved by a dual duct box; e) flow rate characteristics for single duct units.

General information

  •  : Withdrawn
     : 1981-12
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 11
  • ISO/TC 144/SC 2
  • RSS updates


Amendments are issued when it is found that new material may need to be added to an existing standardization document. They may also include editorial or technical corrections to be applied to the existing document.

Addendum 1

Variable primary flow rate control devices with induced flow facility

Edition 1984

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