ISO/TC 144 - Air distribution and air diffusion -- STAND-BY

Specifies laboratory aerodynamic testing and rating as well as test facilities and measurement techniques for air terminal devices. Gives only tests for the assessment of characteristics of the air terminal devices under isothermal conditions. A test method under non-isothermal conditions will be added when approved.

Specifies methods for the aerodynamic testing and rating of dampers and valves used in air distribution systems with pressures up to 2 000 Pa. Applies to the following tests: a) testing for damper and valve leakage; b) testing of casing leakage; c) testing of flow rate/pressure requirements for dampers or valves mounted in a duct system.

Gives different methods of measuring air flow rate in an air handling duct which, without the need of calibration, meet various specific requirements in the field of air distribution and air diffusion. For the purpose of this standard an "air handling duct" is defined as a tight section of ductwork which cross-section may be circular or, excluding for Pitot-static tubes, rectangular.

Specifies dimensional characteristics of straight elements of circular and rectangular ducts. Applies to air ducts used in heating, ventilating and air conditioning. Tabulates recommended (R 10 series) and additional sizes for circular ducts (tables 1 and 2) as well as recommended sizes for rectangular ducts (table 3).

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.

Defines the elements and accessories used in the techniques of air distribution and diffusion. In addition to terms used in the three official ISO languages (English, French and Russian) the equivalent terms and their definitions in the German language are included.