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Ductwork cleaning requirements and access doors. How to interpret DW/144, TR/19 and BS EN 15780

Ductwork cleaning requirements and access doors. How to interpret DW/144, TR/19 and BS EN 15780

Document Status



Mechanical & Electrical Supplement


Highlights the importance of ensuring a regular cleaning regime for ductwork ventilation systems, looking at current guidance, location and size of access doors and includes a checklist.


Publisher History

Represents the interests of companies involved with ductwork, including manufacturers, installers and allied companies who supply or provide support. Aims to promote specification, design and installation of ductwork and support higher standards among membership through education and information on the latest legislation and technical developments



NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

IHS Markit

IHS Markit is a leading global source of critical information and insight for customers in a broad range of industries. Our customer product and service solutions span four major areas of information: energy, product lifecycle management, environmental and security. By focusing on our customers first, we deliver data and expertise that enable innovative and successful decision-making. Customers range from governments and multinational companies to smaller companies and technical professionals in more than 180 countries. IHS has been in business since 1959 and employs more than 3,500 people in 35 locations around the world.

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