Features and Benefits:
Rytons A1® Fire-rated 100mm Dia. Ducting Kits
General Details
- Custom-made 100mm diameter spiral metal ducting kits with a choice of rectangular (110x54mm) or round (100mm) connectors for HVAC supply and extract applications.
- Made from A1 classified galvanised steel for fire safety, strength and durability.
- Non-combustible, suitable for multi-storey and higher-risk buildings.
- Choice of grille styles to suit different airflow and design needs, with flanged options for cladding applications to conceal cut edges for a neat finish.
- Grilles offer low resistance and high airflow, many exceeding 90% of the duct free area.
- Grilles supplied custom powder coated to Class A2-s1, d0, with options from the RAL Classic colour chart in matt, semi-gloss or gloss finishes. Signature architectural finishes available on request.
- Integrated weather protection includes discreet drainage holes and angled louvres to promote water runoff and reduce the risk of transfer into the duct.
- Air bricks and plenums are brick-sized (not duct-sized) for simple installation using standard mortar joints, ensuring an aligned appearance in brickwork.
- 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.
- Bespoke design service available. For further information contact our Technical Sales Office on 01536 511874 or email admin@rytons.com.
- Telescopic fitting air brick allows the overall length of the ducting kit to be extended during installation, providing flexibility to accommodate minor variations in the external façade.
- Supplied ready to install with no on-site assembly required.
- Duct factory fitted to the plenum adaptor.
- 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 100mm Dia. 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 100mm Dia. Ducting Kits:
Rytons A1® Fire-rated Ducting Kit 100mm Dia. with Return Grille Double Air Brick
Return Grille Double Air Brick: 18,720mm² free area (over 90% of the duct).
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom connector for 110mm x 54mm or 100mm dia. ducting.
110mm x 54mm – custom overall length (including plastic duct connector RD4FR+RD4CONN – refer to drawing). Note: Rytons recommend adding 200mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
100mm dia. – custom overall length (including plastic duct connector RD4CONN – refer to drawing). Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Properties: Class A1 fire-rated 0.9mm/0.5mm 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 6109948 and 6109949.
Patent Approved.
Product Code: A1DK100RGD.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Ducting Kit 100mm Dia. with Return Grille Double Air Brick Flanged
Return Grille Double Air Brick Flanged (15mm flange with corner screw holes): 18,720mm² free area (over 90% of the duct).
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom connector for 110mm x 54mm or 100mm dia. ducting.
110mm x 54mm – custom overall length (including plastic duct connector RD4FR+RD4CONN – refer to drawing). Note: Rytons recommend adding 200mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
100mm dia. – custom overall length (including plastic duct connector RD4CONN – refer to drawing). Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Properties: Class A1 fire-rated 0.9mm/0.5mm 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 6109946 and 6109947.
Patent Approved.
Product Code: A1DK100RGDF.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Ducting Kit 100mm Dia. with Square Holed Double Air Brick
Square Holed Double Air Brick: 18,064mm² free area (over 90% of the duct).
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom connector for 110mm x 54mm or 100mm dia. ducting.
110mm x 54mm – custom overall length (including plastic duct connector RD4FR+RD4CONN – refer to drawing). Note: Rytons recommend adding 200mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
100mm dia. – custom overall length (including plastic duct connector RD4CONN – refer to drawing). Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Properties: Class A1 fire-rated 0.9mm/0.5mm 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 6109948 and 6109949.
Patent Approved.
Product Code: A1DK100SQD.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Ducting Kit 100mm Dia. with Square Holed Double Air Brick Flanged
Square Holed Double Air Brick Flanged (15mm flange with corner screw holes): 18,064mm² free area (over 90% of the duct).
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom connector for 110mm x 54mm or 100mm dia. ducting.
110mm x 54mm – custom overall length (including plastic duct connector RD4FR+RD4CONN – refer to drawing). Note: Rytons recommend adding 200mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
100mm dia. – custom overall length (including plastic duct connector RD4CONN – refer to drawing). Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Properties: Class A1 fire-rated 0.9mm/0.5mm 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 6109946 and 6109947.
Patent Approved.
Product Code: A1DK100SQDF.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Ducting Kit 100mm Dia. with FlowRyt® Double Air Brick
FlowRyt® Double Air Brick: 18,000mm² free area (over 90% of the duct).
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom connector for 110mm x 54mm or 100mm dia. ducting.
110mm x 54mm – custom overall length (including plastic duct connector RD4FR+RD4CONN – refer to drawing). Note: Rytons recommend adding 200mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
100mm dia. – custom overall length (including plastic duct connector RD4CONN – refer to drawing). Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Properties: Class A1 fire-rated 0.9mm/0.5mm 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 6109948 and 6109949.
Patent Approved.
Product Code: A1DK100FRD.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated Ducting Kit 100mm Dia. with FlowRyt® Double Air Brick Flanged
FlowRyt® Double Air Brick Flanged (15mm flange with corner screw holes): 18,000mm² free area (over 90% of the duct).
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom connector for 110mm x 54mm or 100mm dia. ducting.
110mm x 54mm – custom overall length (including plastic duct connector RD4FR+RD4CONN – refer to drawing). Note: Rytons recommend adding 200mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
100mm dia. – custom overall length (including plastic duct connector RD4CONN – refer to drawing). Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Properties: Class A1 fire-rated 0.9mm/0.5mm 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 6109946 and 6109947.
Patent Approved.
Product Code: A1DK100FRDF.
Download Drawing. | Download Golden Thread.
Rytons A1® Fire-rated 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.
Custom connector for 110mm x 54mm or 100mm dia. ducting.
110mm x 54mm – custom overall length (including plastic duct connector RD4FR+RD4CONN – refer to drawing). Note: Rytons recommend adding 200mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
100mm dia. – custom overall length (including plastic duct connector RD4CONN – refer to drawing). Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Properties: Class A1 fire-rated 0.9mm/0.5mm 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 6235655 and 6327475.
Patent Approved.
Product Code: A1DK100FRR.
Download Drawing. | Download Golden Thread.
NBS Source Specifications:
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Pressure Loss Data
Golden Thread
