Also see:
8.4.2.78.4.1.6 Ductwork
Ductwork design and the materials used should be suitable for the intended purpose and not adversely affect the performance of the building. MVHR ductwork and insulation should be installed to a satisfactory standard.
Where ductwork routes require alterations to structural elements, these should be in accordance with the manufacturer’s recommendations or in accordance with Technical Requirement R5.
Ductwork should:
- provide satisfactory performance for the life of the system
- be routed as directly as practicable
- be of a rigid or semi-rigid material suitable for use in MVHR systems see figure 4
- be fixed in accordance with the manufacturer’s recommendations.
Bends, connections and junctions should be formed using proprietary components that are part of the ductwork system.
Flexible ducting should:
- only be located adjacent to fan units or air valves
- not be more than 300mm in length
- not be used to form bends.
Last updated: 2nd January 2024