Rytons Cowled Light Draft Airliner Passive Vent Set

Rytons 9×9 Cowled Ventilation Set with Louvre Ventilator

Telescopic cavity liner set with external cowl for ventilating boilers, stoves and fires.
Cowl protects against excessive weather conditions and alleviates air blasts through the cavity.
Contains a system of internal baffles to reduce light and draughts.

Finished with a fixed open louvre ventilator internally.
External water baffles prevent the transfer of water across the cavity.
The cowl, air brick and louvre grille U.V. stabilised to slow down the effects of sunlight.
HETAS approved for use with solid fuel appliances.

Equivalent Area:

24,000mm² (240cm²) per set (tested to BS EN 13141-1:2004 and independently verified by the BRE).

Size:

Cowl: 274mm L x 235mm H x 103mm D.
AirLiner sleeve: 220mm W x 207mm H, extends from 250mm to 404mm L (including air brick) (see image gallery).
Louvre grille: 271mm L x 247mm H.

Colours:

Terracotta: RYTTCL20TCWL.
Buff/Sand: RYTTCL20BCWL.
White: RYTTCL20WCWL.
White louvre grille.

Composition:

Cowl and louvre grille: U.V. stabilised high impact polystyrene.
Multifix Air Brick: U.V. stabilised polypropylene.
AirLiner sleeve: Polypropylene (contains recycled plastic).

Reference Material:

The equivalent area tested to BS EN 13141-1:2004 and independently verified by the BRE.
Also refer to The Building Regulations, Approved Document J,
The Building (Scotland) Regulations, Mandatory Standard 3.21,
The Building Regulations (Northern Ireland), Technical Booklet L,
British Standard BS 5440-2,
British Standard BS 5871-3 (decorative fuel effect gas fires).