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Ducting to Airbrick Adaptor Sets

Simple to install pre-assembled sets, that quickly and conveniently adapts rigid round and rectangular extraction ductwork to terminate at a standard plastic airbrick.

The adaptor sets provides a complete solution when ducting through to an exterior wall. It comes as a single unit in a convenient preassembled set that is built-in as part of the brickwork package and enables first-fix ceiling duct extraction connections.

It terminates at a standard plastic airbrick, which is supplied with the set, and installed exactly the same way as standard airbrick practice, making the process quick and easy.

The Ducting to Airbrick Adaptor Sets are ready to fit straight from the box - saving time, reduces cost and minimises the need for external fitters, core drilling and specialist tools.

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Features & Benefits

  • Enables rigid extraction ductwork termination to be built in as part of the brickwork package
  • Doesn’t restrict or interrupt ducting airflow
  • Convenient ‘1 product code’ assembled kits for immediate installation
  • Eliminates the requirement for retrospective through wall core drilling
  • Enables 1st fix ceiling duct extraction connections to outlet vent
  • Durable and totally resistant to decay
  • Airbricks available in a variety of colours to blend with various brick types



  • Floor level voids
  • External walls

Suitable for round and rectangular rigid extraction ductwork from:

  • Bathrooms
  • WC Cloakrooms
  • Utility Rooms

Technical Information

Suitable for working temperatures of -20 to 60°

Round Ducting to Airbrick Adaptor Set – product 3500+colour

  • For 100mm diameter round rigid ducting

Assembled set contains:

  • 9x3” (215 x 69mm) plastic airbrick
  • Slotted airbrick connector
  • Circular duct adaptor 100 (dia) x 140 (l) mm
  • Circular duct tube – 100 (dia) x 150 (l) mm

Rectangular Ducting to Airbrick Adaptor Set- product 3510+colour

  • Suitable for 110 x 54mm rectangular rigid ducting

Assembled set contains:

  • 9x3” (215 x 69mm) plastic airbrick
  • Slotted airbrick connector
  • Rectangular duct profile – 110 (w) x 54 (h) x 390 (l) mm

How to order

  • Quantity will be relative to the number of bathroom, WC cloakroom and utility extraction fans required by the project
  • Ensure that the correct shaped set has been selected to suit the ductwork
  • State the airbrick colour required

Installation advice

  • Build in the set’s airbrick (to replace a regular brick) as normal as brick and blockwork proceeds
  • The installed position and level of the set is determined by the extraction fan connections
  • The set will project beyond the inner wall leaf to allow for the fitting of additional ducting or an extraction fan
  • As with all through cavity wall components install a DPC cavity tray, with wall weep and stopends, above the installed adaptor set to collect any water ingress
  • We recommend the Inter-loc 4 horizontal cavity tray and 1143 or TW1 wall weeps

Quality, regulations and standards

  • Helping to meet Building Regulation Part F
  • Equivalent area marking to front face of airbrick to comply with BS EN 13141-1
  • Manufactured to BS EN ISO 9001

Material and colour options

  • Airbrick manufactured in UV Stabilised polypropylene
  • Available in terracotta, buff, brown, grey, black and white
  • All other components manufactured from HIPS (High Impact Polystyrene)
  • nbs plus
  • riba

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