Features and Benefits:
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- 150mm (220mm x 90mm) RytDuct Flat Channel Duct
- External Grilles 220mm x 90mm – 150mm Dia.
- Rytons A1® Fire-rated Return Grilles 175mm x 175mm with Spigots
Rytons A1® Fire-rated Return Grilles 175mm x 175mm with Spigots
- General Details
- Pressure Loss Data
- Golden Thread
- Related Products
- A 175mm W x 175mm H metal louvre grille with a choice of 100mm, 125mm or 150mm diameter spigots.
- Manufactured from A1 classified galvanised steel.
- Wide grille covers damage caused by core drilling to maintain a neat appearance in brickwork or cladding.
- 25mm deep spigot provides a positive attachment for ducting.
- Supplied custom powder coated to Class A2-s1, d0. Choose from the RAL Classic colour chart in matt, semi-gloss or gloss finishes to match cladding or brickwork. Signature architectural finishes are also available.
- Built-in weather protection. Drainage holes provide discreet water outlets, and louvres promote runoff, reducing the risk of water transfer into the cavity or ducting.
- Compatible with Rytons 125mm dia. AirCore® tubes (AC10TUBE and AC7TUBE) and Rigid Pipe (RD51RND).
- Suitable for:
- The external walls of high-rise relevant buildings over 18m high (11m high in Scotland).
- The external walls of relevant buildings 11m+ in height or more than 5 storeys, undergoing unsafe cladding remediation work (Building Safety Act 2022).
- The external walls of higher-risk buildings at least 18m high or with at least 7 storeys (Building Safety Act 2022).
- The external surfaces of residential purpose group buildings more than 11m high.
- The external surfaces of residential purpose group buildings 11m high or less where an external wall is within 1m of the relevant boundary.
- All other residential and non-residential buildings.
- Bespoke design service available. For further information contact our Technical Sales Office on 01536 511874 or email admin@rytons.com.
Disclaimers:
- The installation of metal grilles alone will not satisfy the requirements of high-rise buildings which require all materials forming part of the external wall, or a specified attachment, to be made from non-combustible materials. For compliant ducting kits, see Rytons A1 Fire-rated Range.
A1 Fire Classification Explained:
- Rytons A1® Fire-rated Return Grilles 175mm x 175mm with Spigots are made from galvanised steel. Galvanised steel is considered fire class A1 without testing, as per European Commission paper 96/603/EC referred to in BS EN 13501-1:2018.
- Classification: A1. Definition: Non-combustible. Description: No contribution to fire.
Specifications:
Rytons A1® Fire-rated Return Grille 175mm x 175mm with 97mm Dia. Spigot
Return Grille: 175mm W x 175mm H x 8mm D (with corner screw holes).
Spigot: 97mm Dia. x 25mm D.
Custom RAL colour in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
16,640mm² free area per unit (over 90% of the free area of its associated ducting).
Properties: Class A1 fire-rated 0.9mm galvanised steel. Class A2-s1, d0 fire-rated RAL colour powder coating.
Patent Pending.
Product Code: A1RD4LV.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Return Grille 175mm x 175mm with 122mm Dia. Spigot
Return Grille: 175mm W x 175mm H x 8mm D (with corner screw holes).
Spigot: 122mm Dia. x 25mm D.
Custom RAL colour in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
16,640mm² free area per unit (over 90% of the free area of its associated ducting).
Properties: Class A1 fire-rated 0.9mm galvanised steel. Class A2-s1, d0 fire-rated RAL colour powder coating.
Patent Pending.
Product Code: A1RD5LV.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Return Grille 175mm x 175mm with 147mm Dia. Spigot
Return Grille: 175mm W x 175mm H x 8mm D (with corner screw holes).
Spigot: 147mm Dia. x 25mm D.
Custom RAL colour in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
16,640mm² free area per unit (over 90% of the free area of its associated ducting).
Properties: Class A1 fire-rated 0.9mm galvanised steel. Class A2-s1, d0 fire-rated RAL colour powder coating.
Patent Pending.
Product Code: A1RD6LV.
Download Drawing. | Download Golden Thread.
Reference Material – Fire Safety:
- England & Wales: view extracts >>
- Approved Document B: Fire safety (Volume 1) (2019 edition incorporating 2020 and 2022 amendments) for England.
- Approved Document B: Fire safety (Volume 2) (2006 edition incorporating 2010, 2013, 2016, 2017 and 2020 amendments) for Wales.
- The Building Safety Act.
- Scotland: view extracts >>
- Building Standards Scotland Domestic Technical Handbook.
- Northern Ireland: view extracts >>
- Technical Booklet B (Materials and workmanship) July 2013.
- Technical Booklet E (Fire safety) 2012.
- Amendments Booklet – 2022 (AMD 7).
Reference Material – Background Ventilation:
- England & Wales: view extracts>>
- Approved Document F: Means of Ventilation in Dwellings (2021 edition in England) for works and planning applications after 15 June 2023.
- Approved Document F: Ventilation (2022 edition in Wales) for works and planning applications after 23 November 2023.
- Installation of ventilation systems – 1.80: Each air terminal should have a free area of at least 90% of the free area of its associated duct.
- Scotland: view extracts>>
- Building Standards Scotland Domestic Technical Handbook – Mandatory Standard 3.14 Ventilation.
- Northern Ireland: view extracts>>
- Building Regulations (Northern Ireland) Technical Booklet K, Ventilation.
- Republic of Ireland: view extracts>>
- NSAI SR54: Code of practice for the energy efficient retrofit of dwellings.
- Building Regulations 2019, Technical Guidance Document F: Ventilation.
Reference Material – Heat Producing Appliance Ventilation:
- England & Wales:
- Stove ventilation: extracts and ventilation calculator>>
- Open fire ventilation: extracts and ventilation calculator>>
- Gas appliance ventilation: extracts and ventilation calculator>>
- Scotland:
- Stove ventilation: extracts and ventilation calculator>>
- Open fire ventilation: extracts and ventilation calculator>>
- Gas appliance ventilation: extracts and ventilation calculator>>
- Northern Ireland:
- Stove ventilation: extracts and ventilation calculator>>
- Open fire ventilation: extracts and ventilation calculator>>
- Gas appliance ventilation: extracts and ventilation calculator>>
- Republic of Ireland:
- Stove ventilation: extracts>>
- Open fire ventilation: extracts and ventilation calculator>>
- Gas appliance ventilation: extracts>>