HM99ALUM – Rytons 9×9 Aluminium Hit & Miss Ventilator

General Details

HM99ALUM – Rytons 9×9 Aluminium Hit & Miss Ventilator

  • Aluminium hit & miss grille.
  • Manually adjusted for controllable ventilation.
  • Durable, slim and with a lustrous finish for a pleasing appearance
  • Note: Hit & Miss Ventilators must not be used to supply combustion and cooling air to boilers, stoves and fires.

Free Area:

  • 11,250mm² (112.5cm²) per unit.


  • 242mm L x 242mm H (see image gallery above).
  • CAD drawing available by email.


  • Self colour aluminium: HM99ALUM (bagged HM99ALBG).
  • Powder coating available in a range of colours and finishes using the Tailor-made by Rytons bespoke ventilation service.


  • 0.8mm (20 gauge) aluminium.


  • Position over opening and fasten into place.

Handling Information:

  • Box quantity: 25 number.
  • Box weight: 4.25kg.

Reference Material:

  • 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 Specification: