DW/143 Ductwork Air Leakage Testing: Guide to Good Practice

DW/143 defines best practice guidance for the air leakage testing of sheet metal ductwork systems, supporting compliance with the performance standards outlined in DW/144 and current Building Regulations.

It explains the duct pressure classifications (Classes A to D) and clarifies where air leakage testing is mandatory, particularly for high-pressure systems. Practical advice is provided on planning and managing test zones, setting up test rigs, conducting positive pressure tests, identifying leakage paths, and completing compliant documentation.

The guide also offers recommendations for ductwork fabrication and installation techniques to minimise leakage risks, along with sample test sheets and air leakage calculation templates for on-site use.

Key Features:

• Covers ductwork classification, air leakage limits, and mandatory testing requirements
• Practical guidance on air leakage testing procedures under positive pressure
• Advice for ductwork contractors, system designers, commissioning and site engineers
• Sample test forms and calculation examples for recording compliance
• Acknowledges the reintroduction of Class D high-pressure ductwork to align with European practice

Published Date: 01/01/2013
Number Of Pages: 25
ISBN: 978-0-903783-66-8
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