ACFIRE125 – Rytons 125mm AirCore® Intumescent RytBlock

General Details

ACFIRE125 – Rytons 125mm AirCore Intumescent RytBlock

  • Heavy duty intumescent grille for walls and ducts.
  • In the event of a fire the slats fuse together and give a complete seal in 2 minutes.
  • Gives 3 hours protection preventing the passage of smoke and gases.
  • Tested in accordance with BS476 Parts 20 and 22.
  • Temperature increase insulated for 22 minutes.
  • Steel framework protects surrounding intumescent materials by preventing the inward deformation.
  • May be used in high humidity.
  • Compatible with Rytons 125mm Dia. AirCore range.

Free Area:

  • 5,150mm² (51.5cm²) per unit.


  • 118mm Dia. x 43mm D (see image gallery above).
  • CAD drawing available by email.


  • Steel grey.


  • Steel framework protecting intumescent materials.


  • Position the intumescent block inside the AirCore tube behind the internal panel or external grille (whichever location has the greater fire risk).
  • Important: The intumescent block must be completely surrounded by brickwork or blockwork for successful deployment.

Handling Information:

  • Weight: 0.17kg.

NBS Plus Specification: