RD4H90 – Rytons 90° Horizontal Bend (110mm x 54mm Range)

General Details

RD4H90 – Rytons 90° Horizontal Bend (110mm x 54mm Range)

  • 90° horizontal bend for 110mm x 54mm rectangular ducting.
  • Female component.  Part of Rytons 100mm (110mm x 54mm) RytDuct® Range.
  • For applications requiring lower extraction rates such as bathrooms, WCs and utility rooms.
  • Suitable for use with fans with a maximum output of 250m³ per hour.
  • Operating temperature range -15ºC to 60ºC.
  • Meets UL94 HB flammability standard.

Compatible Components:

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

Free Area:

  • 5,424mm² (54.24cm²) per unit.

Minimum/Maximum Operating Temperatures:

  • -15ºC to 60ºC.

Pressure Loss:

  • 8 l/s: 2.00 pa.
  • 13 l/s: 8.40 pa.
  • 21 l/s: 22.80 pa.
  • 30 l/s: 39.80 pa.
  • 60 l/s: 161.90 pa.
  • 120 l/s: 635.00 pa.


  • White polypropylene.
  • Manufactured in compliance with Domestic Plastic Ductwork Specification DW/154.
  • Meets UL94 HB flammability standard.

Handling Information:

  • Individual weight: 120g.

NBS Specification:

Rytons is proud to be a family run business and British manufacturer since 1972.

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