Rytons A1® Fire-rated Ducting Kits 220mm x 90mm with Double Air Bricks

General Details
  • A range of tailor-made metal ducting kits compatible with rectangular HVAC supply and extract ducting 220mm x 90mm.
  • 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 of over 90% of the free area of the duct.
  • 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.
no-install-required-stamp-ORIG-220221-small
  • 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.

  • 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.

A1 Fire Classification Explained:

  • Rytons A1® Fire-rated Ducting Kits 220mm x 90mm with Double 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:

  • England & Wales: view extracts >>
  • Approved Document B: Fire safety (2019 edition incorporating 2020 amendments).
  • Approved Document B: Fire safety (2022 amendments) for England.
  • The Building Safety Act 2022.
  • Scotland: view extracts >>
  • Building Standards Scotland Technical Handbook – Domestic: June to November 2022 and from December 2022.
  • Northern Ireland: view extracts >>
  • Technical Booklet B (Materials and workmanship) July 2013.
  • Technical Booklet E (Fire safety) 2012.
  • Amendments Booklet – 2022 (AMD 7).

Specifications:

  • Please note: 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 220mm x 90mm:

Rytons A1® Fire-rated Ducting Kit 220mm x 90mm 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 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 6085478.
Patent Pending.
Product Code: A1DK220X90RGD.
Download Drawing.

Rytons A1® Fire-rated Ducting Kit 220mm x 90mm 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 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 6085479.
Patent Pending.
Product Code: A1DK220X90RGDF.
Download Drawing.

Rytons A1® Fire-rated Ducting Kit 220mm x 90mm 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 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 6085478.
Patent Pending.
Product Code: A1DK220X90SQD.
Download Drawing.

Rytons A1® Fire-rated Ducting Kit 220mm x 90mm 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 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 6085479.
Patent Pending.
Product Code: A1DK220X90SQDF.
Download Drawing.

Rytons A1® Fire-rated Ducting Kit 220mm x 90mm 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 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 6085478.
Patent Pending.
Product Code: A1DK220X90FRD.
Download Drawing.

Rytons A1® Fire-rated Ducting Kit 220mm x 90mm 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 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 6085479.
Patent Pending.
Product Code: A1DK220X90FRDF.
Download Drawing.

NBS Specifications:

Rytons A1® Fire-rated 90° Balcony Ducting Kits 220mm x 90mm:

Rytons A1® Fire-rated 90° Ducting Kit 220mm x 90mm 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 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 6085482.
Patent Pending.
Product Code: A190DK220X90RGDF.
Download Drawing.

Rytons A1® Fire-rated 90° Ducting Kit 220mm x 90mm 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 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 6085482.
Patent Pending.
Product Code: A190DK220X90SQDF.
Download Drawing.

Rytons A1® Fire-rated 90° Ducting Kit 220mm x 90mm 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 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 6085482.
Patent Pending.
Product Code: A190DK220X90FRDF.
Download Drawing.

NBS Specifications:

Rytons A1® Fire-rated S-Shape Window Head Ducting Kits 220mm x 90mm:

Rytons A1® Fire-rated S-Shape Ducting Kit 220mm x 90mm 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 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 6087686.
Patent Pending.
Product Code: A1SSDK220X90RGD.
Download Drawing.

Rytons A1® Fire-rated S-Shape Ducting Kit 220mm x 90mm 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 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 6087687.
Patent Pending.
Product Code: A1SSDK220X90RGDF.
Download Drawing.

Rytons A1® Fire-rated S-Shape Ducting Kit 220mm x 90mm 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 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 6087686.
Patent Pending.
Product Code: A1SSDK220X90SQD.
Download Drawing.

Rytons A1® Fire-rated S-Shape Ducting Kit 220mm x 90mm 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 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 6087687.
Patent Pending.
Product Code: A1SSDK220X90SQDF.
Download Drawing.

Rytons A1® Fire-rated S-Shape Ducting Kit 220mm x 90mm 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 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 6087686.
Patent Pending.
Product Code: A1SSDK220X90FRD.
Download Drawing.

Rytons A1® Fire-rated S-Shape Ducting Kit 220mm x 90mm 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 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 6087687.
Patent Pending.
Product Code: A1SSDK220X90FRDF.
Download Drawing.

NBS Specifications:

MiB_Logo_Horizontal_Colour

Rytons is proud to be a family run business and British manufacturer since 1972

Pressure Loss Data