RD4MFAB – Rytons Multifix® Air Brick with Flat Channel Ducting Adaptor (110mm x 54mm Range)

General Details

RD4MFAB – Rytons Multifix Air Brick with Flat Channel Ducting Adaptor (110mm x 54mm Range)

  • Full-size Rytons Multifix Air Brick with an adaptor to connect to 110mm x 54mm Flat Channel Duct RD4/M.
  • Available in a range of seven colours to maintain the external aesthetic appearance.
  • Multifix Air Brick U.V. stabilised to slow down the effects of sunlight.
  • Part of Rytons 100mm (110mm x 54mm) RytDuct® Range.
  • For applications requiring lower extraction rates such as bathrooms, WCs and cooker hoods.
  • Use with cooker hoods and extraction fans with a maximum output of 250m³ per hour.
  • Suitable for working temperatures -20ºC to 60ºC.


  • 220mm L x 72mm H overall ext. with 106mm L x 51mm H overall ext. male connector.

Compatible Components:

  • Rytons Flat Channel Duct 1m L RD41M.
  • Rytons Flat Channel Duct 2m L RD42M.

Free Area:

  • 4,794mm² (47.94cm²) per unit.


  • Terracotta: RD4MFABTC.
  • Buff/Sand: RD4MFABBS.
  • Blue/Black: RD4MFABBB.
  • Grey: RD4MFABGR.
  • White: RD4MFABWH.
  • Brown: RD4MFABDB.
  • Black: RD4MFABBL.


  • Multifix Air Brick: U.V. stabilised polypropylene.
  • Adaptor: High quality plastic.

NBS Plus Specification: