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

General Details

Features and Benefits:

  • A range of tailor-made metal refurbishment 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 buildings 11m and above undergoing unsafe cladding remediation work.
  • Straight kit and 90° balcony kit designs allow remedial work without accessing the apartments to avoid disrupting the occupants. The oversize metal duct encases 220mm x 90mm in-situ plastic ducting and terminates with a 50mm wide flange to aid secure fixing to the cavity board.
  • 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.
  • 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.
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  • 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 Retrofit 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:

  • 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 Retrofit Straight Ducting Kits 220mm x 90mm:

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct 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 6085480.
Product Code: A1RFDK220X90RGD.
Download Drawing.

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct 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 6085481.
Product Code: A1RFDK220X90RGDF.
Download Drawing.

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct 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 6085480.
Product Code: A1RFDK220X90SQD.
Download Drawing.

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct 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 6085481.
Product Code: A1RFDK220X90SQDF.
Download Drawing.

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct 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 6085480.
Product Code: A1RFDK220X90FRD.
Download Drawing.

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct 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 6085481.
Product Code: A1RFDK220X90FRDF.
Download Drawing.

NBS Specifications:

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

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct for fixing.
Custom drop from underside of duct to face of air brick (refer to drawing).
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 6085477.
Product Code: A1RF90DK220X90RGDF.
Download Drawing.

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct for fixing.
Custom drop from underside of duct to face of air brick (refer to drawing).
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 6085477.
Product Code: A1RF90DK220X90SQDF.
Download Drawing.

Rytons A1® Fire-rated Retrofit 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.
225mm x 95mm sleeve to encase in situ ducting 220mm x 90mm.
50mm flange (with eight screw holes) at the end of the duct for fixing.
Custom drop from underside of duct to face of air brick (refer to drawing).
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 6085477.
Product Code: A1RF90DK220X90FRDF.
Download Drawing.

NBS Specifications:

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