BS EN 12239:2001

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Terms and definitions
   3.2 Symbols
4 Types of air terminal devices
5 Method of test
   5.1 Principle
   5.2 Test set-up
   5.3 Installation
        5.3.1 General
        5.3.2 Test installation D
        5.3.3 Test installation P
   5.4 Velocity instruments
   5.5 Test room
   5.6 Procedure
        5.6.1 General
        5.6.2 Measuring with tracer gas
        5.6.3 Measuring with zero pressure-difference method
   5.7 Expression of results
        5.7.1 Pressure measurement for a given flow rate
        5.7.2 Velocity measurement
        5.7.3 Induction rate measurement
6 Uncertainty

Defines methods for the laboratory aerodynamic testing and rating of low velocity air terminal devices for displacement flow applications, including the specification of suitable test facilities and measurement techniques.

This European Standard specifies methods for the laboratory aerodynamic testing and rating of low velocity air terminal devices for displacement flow applications, including the specification of suitable test facilities and measurement techniques. The standard gives only tests for the assessment of characteristics of the air terminal devices under non-isothermal conditions. This standard applies to Class IV air terminal devices as defined in EN 12238.