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AS 4254.1:2021


Ductwork for air-handling systems in buildings, Part 1: Flexible duct

Included in Ductwork and air handling systems set
Synopsis: Provides standardized requirements for the performance testing, manufacture and installation of flexible ducts. It is intended for use by specifiers, manufacturers, regulatory authorities and installers of air-handling systems for buildingsKEYWORDS: Ductwork; Air-handling; Flexible duct; Insulation
Published: 25/06/2021
Pages: 19
Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope
2 Normative references
3 Terms and definitions
4 Testing
5 Construction and installation
5.1 Flexible duct
5.1.1 General
5.1.2 Wet area exhaust flexible duct
5.2 Flexible duct sealing
5.2.1 Sealing media
5.2.2 Air sealing
5.2.3 Vapour sealing by duct tape
5.2.4 Mechanical fixing
5.2.5 Surface preparation
5.2.6 Leakage
5.3 Test criteria
5.3.1 General
5.3.2 Mechanical performance
5.3.3 Fire hazard properties
5.4 Installation
5.4.1 General
5.4.2 Connections
5.4.3 Hangers, support and load distribution systems
5.5 Thermal insulation used on flexible duct
5.6 Labelling of flexible duct
5.7 Validity period for test results
5.8 Flexible duct conformance report summary
Appendix A
Appendix B
B.1 General
B.2 Sampling
B.3 Visual inspection
B.4 Measurement of the annular gap
B.5 Thermal resistance determination
B.6 Test report
Cited references in this standard
Methods for fire tests on building materials, components and structures, Part 3: Simultaneous determination of ignitability, flame propagation, heat release and smoke release
Thermal insulation materials for buildings, Part 1: General criteria and technical provisions
UL 181
Factory-made air ducts and connectors
ASTM C167-18
Standard Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
General requirements for the competence of testing and calibration laboratories
Content history
[Available Superseded]
DR AS 4254.1:2020
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