TC8H&M – Rytons 9×3 Ventilation Set with Hit & Miss Ventilator

General Details

TC8H&M – Rytons 9×3 Ventilation Set with Hit & Miss Ventilator

  • Telescopic cavity liner set for background room ventilation.
  • Allows the introduction of fresh outside air into the room to disperse moisture, odours and other airborne pollutants.
  • Telescopic cavity liner contains an internal baffle to reduce light and draughts.
  • Internal hit & miss grille manually adjusted with a sliding action allowing ventilation to be controlled as required.
  • Air brick and hit & miss grille U.V. stabilised to slow down the effects of sunlight.
  • External water baffles prevent transfer of water across the cavity.
  • Position at high level (typically 1.7m above floor level) for all dwelling types and storey heights.

Equivalent Area:

  • 10,200mm² (102cm²) per set (tested to BS EN 13141-1:2004 and independently verified by the BRE).


  • AirLiner sleeve: 220mm W x 71mm H, extends from 250mm to 368mm L (including air brick) (see image gallery).
  • Hit & Miss grille: 271mm L x 95mm H.


  • Terracotta: TC8H&MTC.
  • Buff/Sand: TC8H&MBS.
  • Blue/Black: TC8H&MBB.
  • Grey: TC8H&MGR.
  • White: TC8H&MWH.
  • Brown: TC8H&MDB.
  • Black: TC8H&MBL.
  • White hit & miss grille.


  • Multifix Air Brick: U.V. stabilised polypropylene.
  • AirLiner sleeve: Polypropylene.
  • AirLiner sleeve contains recycled plastic.
  • Hit & Miss grille: U.V. stabilised high impact polystyrene.


  • No special fixing required. Build in the cavity liner with fitted air brick as work proceeds. Extend the telescopic sleeve as necessary. Fasten the hit & miss ventilator internally.
  • To comply with Building Regulations Part F the ventilator should be sited not less than 1.7m above floor level.

Handling Information:

  • Box quantity: 1 set.
  • Box size: 32cm W x 10.5cm H x 29cm D.
  • Box weight: 0.56kg.

Reference Material:

  • Equivalent area tested to BS EN 13141-1:2004 and independently verified by the BRE.
  • Also refer to: The Building Regulations 2000, Approved Document F,
  • The Building (Scotland) Regulations, Mandatory Standard 3.14,
  • The Building Regulations (Northern Ireland) 2000, Technical Booklet K
  • British Standard BS 5250.

NBS Plus Specification: