Features and Benefits:
Rytons A1® Fire-rated Retrofit Round Ducting Kits
General Details
- A range of custom-made metal refurbishment ducting kits compatible with HVAC supply and extract ducting 100mm dia., 125mm dia. and 150mm dia.
- Installed without requiring access to the apartments to avoid disrupting the occupants.
- Kits feature oversized metal ducting to encase in-situ plastic ductwork and terminate with a 50mm wide flange to aid secure fixing to the cavity board.
- Non-combustible.
- Manufactured from A1 classified galvanised steel.
- FlowRyt® grille provide a high air flow whilst maintaining low resistance.
- The wide flange of the grille covers cut edges to maintain a neat appearance in cladding.
- Grille 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. A small drainage hole in the grille provides a discreet water outlet, and angled grilles promote runoff to reduce the risk of water transfer into the cavity or ducting.
- Suitable for:
- 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 high-rise relevant buildings over 18m high (11m high in Scotland).
- 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.
- Bespoke design service available. For further information contact our Technical Sales Office on 01536 511874 or email admin@rytons.com.
- Telescopic fitting grille allows the overall length of the kit to be extended during installation giving the flexibility to handle minor variations in the external façade.
- Image illustrates telescopic feature only.
- Supplied ready to install with no on-site assembly required.
- No screw fixing or sealing needed, saving time and labour and ensuring correct alignment and airtight joints.
A1 Fire Classification Explained:
- Rytons A1® Fire-rated Retrofit Round Ducting Kits 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.
Reference Material:
- 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.
Rytons A1® Fire-rated Retrofit Round Ducting Kits:
Rytons A1® Fire-rated Retrofit Ducting Kit 100mm Dia. with Round FlowRyt® Grille
Round FlowRyt® Grille (150mm dia. overall inc. flange with screw holes): 4,990mm² free area.
Custom RAL colour grille in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
108mm dia. sheet rolled tube to encase in situ ducting 100mm dia.
50mm flange (with eight screw holes) at the end of the tube for fixing.
Custom overall length (refer to drawing).
Properties: Class A1 fire-rated 0.9mm galvanised steel. Class A2-s1, d0 fire-rated RAL colour powder coating. Spot welded. Everbuild Fire Mate intumescent and acoustic sealant used on all gaps.
Registered Design 6235652.
Patent Approved.
Product Code: A1RFDK100.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Retrofit Ducting Kit 125mm Dia. with Round FlowRyt® Grille
Round FlowRyt® Grille (175mm dia. overall inc. flange with screw holes): 6,912mm² free area.
Custom RAL colour grille in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
133mm dia. sheet rolled tube to encase in situ ducting 125mm dia.
50mm flange (with eight screw holes) at the end of the tube for fixing.
Custom overall length (refer to drawing).
Properties: Class A1 fire-rated 0.9mm galvanised steel. Class A2-s1, d0 fire-rated RAL colour powder coating. Spot welded. Everbuild Fire Mate intumescent and acoustic sealant used on all gaps.
Registered Design 6235653.
Patent Approved.
Product Code: A1RFDK125.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Retrofit Ducting Kit 150mm Dia. with Round FlowRyt® Grille
Round FlowRyt® Grille (200mm dia. overall inc. flange with screw holes): 10,680mm² free area.
Custom RAL colour grille in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
159mm dia. sheet rolled tube to encase in situ ducting 150mm dia.
50mm flange (with eight screw holes) at the end of the tube for fixing.
Custom overall length (refer to drawing).
Properties: Class A1 fire-rated 0.9mm galvanised steel. Class A2-s1, d0 fire-rated RAL colour powder coating. Spot welded. Everbuild Fire Mate intumescent and acoustic sealant used on all gaps.
Registered Design 6235654.
Patent Approved.
Product Code: A1RFDK150.
Download Drawing. | Download Golden Thread.
NBS Source Specifications:
Rytons is proud to be a family run business and British manufacturer since 1972
Pressure Loss Data
Golden Thread
