TC20HCWL – Rytons 9×9 Cowled Ventilation Set with Hit & Miss Ventilator

27,000mm² (270cm²) Equivalent Area

Categories: Background Ventilators, Unsilenced AirCore and AirLiner Sets

General Details

TC20HCWL – Rytons 9×9 Cowled Ventilation Set with Hit & Miss Ventilator

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

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.

Equivalent Area:

27,000mm² (270cm²) 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).
Hit & Miss grille: 271mm L x 247mm H.

Colours:

Bespoke colour matching service available. Call our sales office on 01536 511874 or email admin@rytons.com for details and pricing.

Composition:

Installation:

No special fixing is required. Build in the cavity liner with fitted air brick as work proceeds. Extend the telescopic sleeve as necessary. Fasten the cowl to the brickwork. 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.

Reference Material:

England: view extracts>>
Approved Document F: Means of Ventilation in Dwellings (2010 edition incorporating 2013 amendments).
Approved Document F: Means of Ventilation in Dwellings (2021 edition). Note: The 2021 update takes effect on 15 June 2022. It does not apply to work subject to a building notice, full plans application or initial notice submitted before that date, provided the work for each building is started before 15 June 2023.

Wales: view extracts>>
Approved Document F: Means of Ventilation in Dwellings (2010 edition incorporating 2013 amendments).
Approved Document F: Means of Ventilation in Dwellings (2022 edition). Note: The 2022 update takes effect on 23 November 2022. It does not apply to work subject to a building notice, full plans application or initial notice submitted before that date, provided the work for each building is started before 23 November 2023.