PUFV – Rytons Periscope® Underfloor Ventilator

General Details

Features and Benefits:

  • An underfloor ventilation system for block and beam and timber floors.
  • Expands up to 5 brick courses.
  • Prevents damage by condensation and the build-up of dangerous gases.
  • For use with Rytons Multifix® Air Brick MFAB.


  • 218mm W x 250mm D x 368mm H (fully extended and with Rytons Multifix® Air Brick fitted) (see image gallery above).
  • CAD drawing available by email.

Free Area:

  • 7,750mm² per unit (with Rytons Multifix® Air Brick fitted).


  • Black.


  • Polypropylene.


  • No special fixing required.  Installation is easily carried out as work proceeds.  Adjust the height of the Periscope® to suit brick courses and height of floor (cutting if necessary).


  • To vertically extend more than 5 brick courses use Rytons Periscope® Vertical Extension PUFVVEXT.
  • To connect soil pipe for extended ducting use Rytons Horizontal Adaptor HADAP100.
  • To horizontally extend through wide inner or outer leaves use Rytons 9×3 Non-Telescopic Cavity Liner TCL8LNR.

Handling Information:

  • Box quantity: 20 number.
  • Box size: 81cm W x 45cm H x 31cm D.
  • Box weight: 8.4kg.

Reference Material:

  • Suspended Timber and Suspended Concrete Floors: Ventilate the underfloor space by providing ventilation in two opposing external walls so that the ventilating air will have a free path between opposite sides and to all parts.  Ventilate voids by openings providing not less than 1500mm²/m run of external wall or 500mm²/m² of floor area, whichever gives the greater opening area.  Provide ventilation in internal sleeper walls or similar obstructions to maintain the path of air.
  • The NHBC recommends ventilators for suspended timber floors be spaced at not more than 2m centres and within 450mm of each end of any wall.
  • The Building Regulations state any pipes needed to carry ventilating air should have a diameter of at least 100mm.
  • Also refer to: The Building Regulations 2000, Approved Document C,
  • The Building (Scotland) Regulations, Mandatory Standard 3.4,
  • NHBC Standards,
  • British Standard BS 5250.

NBS Specification:


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

Quote Request


Please note: As a manufacturer, we deal exclusively with trade professionals and are unable to take price enquiries from members of the public.
We aim to respond to quote requests within the next working day.
In case of query please call 01536 511874, thank you.

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