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- 125mm (204mm x 60mm) RytDuct Flat Channel Duct
- Rigid Ducting and Components 204mm x 60mm – 125mm Dia.
- Rytons A1® Fire-rated Ducting Kits 204mm x 60mm with Single Air Bricks
Rytons A1® Fire-rated Ducting Kits 204mm x 60mm with Single Air Bricks
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- A range of tailor-made metal ducting kits compatible with rectangular HVAC supply and extract ducting 204mm x 60mm.
- Made from Class A1 fire-rated galvanised steel and compliant with regulations for the requirement of non-combustible ducting in the external walls of high-rise buildings over 18m (11m in Scotland) and those 11m and above undergoing unsafe cladding remediation work.
- Straight kit, 90° balcony kit and s-shape window head kit designs provide options to accommodate a variety of ductwork locations.
- Three air brick grille styles satisfy the varying design, airflow, and vent placement requirements of buildings. For cladding, flanged options cover cut edges to maintain the external appearance.
- Air bricks maintain low resistance and have high airflows.
- Custom powder coated air brick. Choose from the RAL Classic colour chart in matt, semi-gloss or gloss finish (achieving Class A2-s1, d0) for an air brick that matches cladding or brickwork. Signature architectural coatings are also available.
- Built-in weather protection. Drainage holes in the air brick provide discreet water outlets, and louvred styles feature angled grilles to promote runoff, reducing the risk of water transfer into the duct.
- Air brick/plenum are brick size (rather than duct size) for easy installation using standard mortar joints for a neat appearance in brickwork.
- Telescopic fitting air brick allows the overall length of the kit to be extended during installation giving the flexibility to handle 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 required, saving time, labour and ensuring correct alignment and airtight joints throughout.
A1 Fire Classification Explained:
- Rytons A1® Fire-rated Ducting Kits 204mm x 60mm with Single Air Bricks 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. The material remains robust at elevated temperatures and has a high melting point temperature of 1450-1520° C. Classification: A1. Definition: Non-combustible. Description: No contribution to fire.
Reference Material:
- Building Regulation 7(2) – Ban of combustible materials in the external wall of buildings.
- Building Regulation Approved Document B (fire safety).
- Building standards Scotland technical handbook – domestic (2.7).
Specifications:
- If you can’t see a ducting kit to meet your requirements, we offer a bespoke service to design, fabricate and supply the perfect solution. To discuss your requirements, call our technical sales office on 01536 511874 or email admin@rytons.com.
Rytons A1® Fire-rated Straight Ducting Kits 204mm x 60mm:
Rytons A1® Fire-rated Ducting Kit 204mm x 60mm with Return Grille Single Air Brick
Return Grille Single Air Brick: 7,200mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom overall length (including plastic duct connector – 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 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 6085463.
Product Code: A1DK204X60RGS.
Download Drawing.
Rytons A1® Fire-rated Ducting Kit 204mm x 60mm with Return Grille Single Air Brick Flanged
Return Grille Single Air Brick Flanged (15mm flange with corner screw holes): 7,200mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom overall length (including plastic duct connector – 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 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 6085464.
Product Code: A1DK204X60RGSF.
Download Drawing.
Rytons A1® Fire-rated Ducting Kit 204mm x 60mm with Square Holed Single Air Brick
Square Holed Single Air Brick: 9,032mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom overall length (including plastic duct connector – 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 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 6085463.
Product Code: A1DK204X60SQS.
Download Drawing.
Rytons A1® Fire-rated Ducting Kit 204mm x 60mm with Square Holed Single Air Brick Flanged
Square Holed Single Air Brick Flanged (15mm flange with corner screw holes): 9,032mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom overall length (including plastic duct connector – 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 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 6085464.
Product Code: A1DK204X60SQSF.
Download Drawing.
Rytons A1® Fire-rated Ducting Kit 204mm x 60mm with FlowRyt® Single Air Brick
FlowRyt® Single Air Brick: 8,000mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom overall length (including plastic duct connector – 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 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 6085463.
Product Code: A1DK204X60FRS.
Download Drawing.
Rytons A1® Fire-rated Ducting Kit 204mm x 60mm with FlowRyt® Single Air Brick Flanged
FlowRyt® Single Air Brick Flanged (15mm flange with corner screw holes): 8,000mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom overall length (including plastic duct connector – 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 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 6085464.
Product Code: A1DK204X60FRSF.
Download Drawing.
NBS Specifications:
Rytons A1® Fire-rated 90° Balcony Ducting Kits 204mm x 60mm:
Rytons A1® Fire-rated 90° Ducting Kit 204mm x 60mm with Return Grille Single Air Brick Flanged
Return Grille Single Air Brick Flanged (15mm flange with corner screw holes): 7,200mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom drop from underside of duct to face of air brick (refer to drawing).
Custom overall length (including plastic duct connector – 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 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 6085468.
Product Code: A190DK204X60RGSF.
Download Drawing.
Rytons A1® Fire-rated 90° Ducting Kit 204mm x 60mm with Square Holed Single Air Brick Flanged
Square Holed Single Air Brick Flanged (15mm flange with corner screw holes): 9,032mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom drop from underside of duct to face of air brick (refer to drawing).
Custom overall length (including plastic duct connector – 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 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 6085468.
Product Code: A190DK204X60SQSF.
Download Drawing.
Rytons A1® Fire-rated 90° Ducting Kit 204mm x 60mm with FlowRyt® Single Air Brick Flanged
FlowRyt® Single Air Brick Flanged (15mm flange with corner screw holes): 8,000mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom drop from underside of duct to face of air brick (refer to drawing).
Custom overall length (including plastic duct connector – 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 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 6085468.
Product Code: A190DK204X60FRSF.
Download Drawing.
NBS Specifications:
Rytons A1® Fire-rated S-Shape Window Head Ducting Kits 204mm x 60mm:
Rytons A1® Fire-rated S-Shape Ducting Kit 204mm x 60mm with Return Grille Single Air Brick
Return Grille Single Air Brick: 7,200mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom top or bottom air brick position (refer to drawing).
Custom ‘S’ top (refer to drawing dimension a).
Custom ‘S’ bottom (refer to drawing dimension b).
Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Custom height (refer to drawing dimension c).
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 6087692.
Product Code: A1SSDK204X60RGS.
Download Drawing.
Rytons A1® Fire-rated S-Shape Ducting Kit 204mm x 60mm with Return Grille Single Air Brick Flanged
Return Grille Single Air Brick Flanged (15mm flange with corner screw holes): 7,200mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom top or bottom air brick position (refer to drawing).
Custom ‘S’ top (refer to drawing dimension a).
Custom ‘S’ bottom (refer to drawing dimension b).
Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Custom height (refer to drawing dimension c).
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 6087693.
Product Code: A1SSDK204X60RGSF.
Download Drawing.
Rytons A1® Fire-rated S-Shape Ducting Kit 204mm x 60mm with Square Holed Single Air Brick Grille
Square Holed Single Air Brick: 9,032mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom top or bottom air brick position (refer to drawing).
Custom ‘S’ top (refer to drawing dimension a).
Custom ‘S’ bottom (refer to drawing dimension b).
Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Custom height (refer to drawing dimension c).
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 6087692.
Product Code: A1SSDK204X60SQS.
Download Drawing.
Rytons A1® Fire-rated S-Shape Ducting Kit 204mm x 60mm with Square Holed Single Air Brick Flanged
Square Holed Single Air Brick Flanged (15mm flange with corner screw holes): 9,032mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom top or bottom air brick position (refer to drawing).
Custom ‘S’ top (refer to drawing dimension a).
Custom ‘S’ bottom (refer to drawing dimension b).
Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Custom height (refer to drawing dimension c).
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 6087693.
Product Code: A1SSDK204X60SQSF.
Download Drawing.
Rytons A1® Fire-rated S-Shape Ducting Kit 204mm x 60mm with FlowRyt® Single Air Brick
FlowRyt® Single Air Brick: 8,000mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom top or bottom air brick position (refer to drawing).
Custom ‘S’ top (refer to drawing dimension a).
Custom ‘S’ bottom (refer to drawing dimension b).
Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Custom height (refer to drawing dimension c).
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 6087692.
Product Code: A1SSDK204X60FRS.
Download Drawing.
Rytons A1® Fire-rated S-Shape Ducting Kit 204mm x 60mm with FlowRyt® Single Air Brick Flanged
FlowRyt® Single Air Brick Flanged (15mm flange with corner screw holes): 8,000mm² free area.
Custom RAL colour air brick in matt, semi-gloss or gloss finish achieving Class A2-s1, d0.
Custom top or bottom air brick position (refer to drawing).
Custom ‘S’ top (refer to drawing dimension a).
Custom ‘S’ bottom (refer to drawing dimension b).
Note: Rytons recommend adding 100mm to the external wall measurement to ensure the duct and connector finish within the inner leaf.
Custom height (refer to drawing dimension c).
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 6087693.
Product Code: A1SSDK204X60FRSF.
Download Drawing.
NBS Specifications:
