AAC125LPCWL – Rytons Cowled Super Acoustic LookRyt® AirCore®

45 dB (Dn,e,w).
7,200mm² (72cm²) Equivalent Area

General Details

Features and Benefits

  • Retro-fitted combustion air vent with external cowl for boilers, stoves and fires.
  • AirCore® cowl protects against excessive weather conditions and alleviates air blasts through the cavity.
  • Use in noisy areas to reduce the amount of noise entering the building for a more peaceful environment.
  • Unique draught reducing panel disperses air evenly for improved comfort.
  • Paint or wallpaper the panel to match room décor for a discreet appearance.
  • External water baffle prevents the transfer of water across the cavity.
  • Cowl and external grille U.V. stabilised to slow down the effects of sunlight.
  • HETAS approved for use with solid fuel appliances.
  • Patent Approved GB2490138.
  • Registered Design 4018847.
  • Please note: This item is a plastic component and therefore is not suitable for use within a) the external walls of buildings more than 11m high where people sleep on the premises (residential, institutional or hospitality) or b) external wall surfaces within 1m of the boundary if the building is 11m high or less, in England.  Contact our technical sales office on 01536 511874 about a compliant alternative using Rytons A1 Fire-rated Bespoke Metal Service.

Sound Reduction & Equivalent Area:

  • Sound reduced by 45 dB (Dn,e,w) (tested by BRE Acoustics).
  • 7,200mm² (72cm²) equivalent area (tested to BS EN 13141-1:2004 and independently verified by the BRE).


  • Cowl: 217mm L x 210mm H x 93mm D.
  • External grille: 166mm L x 160mm H.
  • Tube: 127mm (5″) Dia. x 358mm L.
  • LookRyt® panel: 172mm L x 172mm H.


  • Terracotta external: AAC125LPTCWL.
  • Buff/Sand external: AAC125LPBCWL.
  • White external: AAC125LPWCWL.
  • LookRyt® panel: Magnolia (may be painted or wallpapered to match décor).
  • Bespoke colour matching service available.  Call our sales office on 01536 511874 or email admin@rytons.com for details and pricing.


  • Cowl and external grille: U.V. stabilised high impact polystyrene.
  • Tube: High impact polystyrene containing sound absorbent foam lining.
  • Tube contains recycled plastic.
  • Tube softening point: 70ºC (unlined).
  • Tube melting point: 120ºC (unlined).
  • Foam flammability testing: UL94 HF-1.
  • Foam burn rate testing: FMVSS302, 4 inches min-1 (max).
  • LookRyt® panel: High impact styrene.
  • LookRyt® panel melting point: 160-180ºC (unlined).

Reference Material:

  • Measurement of airborne sound insulation was made in accordance with BS EN 20140-10: 1992.
  • Single number quantities were calculated in accordance with BS EN ISO 717-1:1997.
  • Equivalent area tested to BS EN 13141-1:2004 and independently verified by the BRE.

Handling Information:

  • Box quantity: 1 set.
  • Box size: 44cm W x 19cm H x 22.5cm D.
  • Box weight: 0.859kg.

Questions & Answers:

  • Will the vent reduce sound from inside to outside as well as from outside to inside? The BRE has advised us that it’s reasonable to assume that ‘reciprocity’ applies to the vents. That is, the third octave values for sound reduction index are the same in both directions (out to in and in to out).

NBS Specification:


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

BRE Test Report

BRE Test Report Rytons Cowled Super Acoustic LookRyt AirCore AAC125LPCWL

Fitting Instruction Sheet

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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