Rytons A1 Fire-rated Single Air Brick Grilles and Ducting Kits

General Details

Rytons A1 Fire-rated Single Air Brick Grilles and Ducting Kits

  • A range of custom-made galvanised steel air bricks and cross cavity ducting kits for 110mm x 54mm and 204mm x 60mm rectangular ducting.
  • Suitable for use in high-rise buildings with a storey 18m or more above ground level to Regulation 7(2) and Building Regulations Approved Document B.
  • Suitable for use in buildings with a storey 11m or more above ground level to Building (Scotland) technical handbook 2019: domestic and non-domestic, 2.7.
  • Product considered fire class A1 without testing, as per European Commission paper 96/603/EC referred to in BS EN 13501-1:2018.
  • Material not compromised at a temperature of 800°C, as required by the Building Regulations Approved Document B for ductwork spanning the cavity.
  • Classification: A1.  Definition: Non-combustible.  Description: No contribution to fire.
  • Air bricks available in return grille, square holed and louvre grille designs.
  • Extensive choice of finishes allows air brick grilles to maintain the external appearance.

Reference Material:

  • The Building Regulations Approved Document B (Fire safety) – Volume 1: Dwellings (2019 edition). Appendix B: Performance of materials, products and structures B4. NOTE: Regulation 7(2) limits components used in or on the external walls of certain buildings to materials achieving class A2-s1, d0 or class A1 (see Section 10). Assessments cannot be used to demonstrate compliance with this requirement.
  • The Building Regulations Approved Document B (Fire safety) – Volume 2: Buildings other than dwellings (2019 edition). Appendix B: Performance of materials, products and structures B4. NOTE: Regulation 7(2) limits components used in or on the external walls of certain buildings to materials achieving class A2-s1, d0 or class A1 (see Section 10). Assessments cannot be used to demonstrate compliance with this requirement.
  • Building (Scotland) technical handbook 2019: domestic. 2.7 Spread on external walls. 2.7.1 External wall cladding. Storey height more than 11m – Where the building has a storey at a height of more than 11m above the ground the external wall cladding system should be constructed of products achieving European Classification A1 or A2.
  • Building (Scotland) technical handbook 2019: non-domestic. 2.7 Spread on external walls. 2.7.2 Specified attachments. There is a risk of vertical fire spread from specified attachments to an external wall including balconies, solar panels and solar shading. Solar shading are devices attached to an external wall to reduce heat gain within a building by deflecting sunlight. Fire-fighters may not be able to apply a water jet from a fire-fighting hose directly onto a fire that has spread onto specified attachments high above the ground.
  • Where the building has a storey at a height of more than 11m above the ground, specified attachments should be constructed of products achieving European Classification A1 or A2.
  • Extracts from NHBC Technical Extra 25.
  • Page 14: Note: in most cases, a panel of the tested system wouldn’t contain all the components necessary to function as an external wall (for example, cavity trays, weep holes, etc.). Therefore, any additional components must achieve Class A1or A2-s1, d0.
  • Page 16: Minor components within or passing through an external wall: The aim of the regulation is to remove all combustible components from, or within, an external wall.  The majority of air bricks, weep holes, ventilation ducts, etc. can be produced from materials meeting Class A1 or A2-s1, d0, so products meeting these classifications should be used.

Galvanised Steel Air Brick Specifications:

  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Return Grille Air Brick.
  • 215mm L x 60mm H x 50mm D (nominal size).
  • 7,200mm² free area per unit.
  • Finished in a fire-rated RAL colour powder coating (achieving a test result of A2-s1, d0) in matt, semi-gloss* or gloss*.  * Subject to RAL colour.
  • Registered Design 6078054.
  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Return Grille Air Brick with Flange.
  • 215mm L x 60mm H x 50mm D (nominal size) plus 15mm flange with a screw hole in each corner.
  • 7,200mm² free area per unit.
  • Finished in a fire-rated RAL colour powder coating (achieving a test result of A2-s1, d0) in matt, semi-gloss* or gloss*.  * Subject to RAL colour.
  • Registered Design 6078055.
  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Square Holed Air Brick.
  • 215mm L x 60mm H x 50mm D (nominal size).
  • 9,032mm² free area per unit.
  • Finished in a fire-rated RAL colour powder coating (achieving a test result of A2-s1, d0) in matt, semi-gloss* or gloss*.  * Subject to RAL colour.
  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Square Holed Air Brick with Flange.
  • 215mm L x 60mm H x 50mm D (nominal size) plus 15mm flange with a screw hole in each corner.
  • 9,032mm² free area per unit.
  • Finished in a fire-rated RAL colour powder coating (achieving a test result in A2-s1, d0) in matt, semi-gloss* or gloss*.  * Subject to RAL colour.
  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Hooded Louvre Air Brick.
  • 215mm L x 60mm H x 50mm D (nominal size, not including louvres).
  • 2,470mm² free area per unit.
  • Finished in a fire-rated RAL colour powder coating (achieving a test result of A2-s1, d0) in matt, semi-gloss* or gloss*.  * Subject to RAL colour.
  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Hooded Louvre Air Brick with Flange.
  • 215mm L x 60mm H x 50mm D (nominal size, not including louvres) plus 15mm flange with a screw hole in each corner.
  • 2,470mm² free area per unit.
  • Finished in a fire-rated RAL colour powder coating (achieving a test result of A2-s1, d0) in matt, semi-gloss* or gloss*).  * Subject to RAL colour.

Galvanised Steel Air Brick, Adaptor and Ducting Kit Specifications:

  • Rytons A1 Fire-rated Galvanised Steel Ducting Kit 110mm x 54mm.
  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Metal Air Brick 215mm L x 60mm H (Return Grille: 7,200mm² free area, Square Holed: 9,032mm² free area, Hooded Louvre: 2,470mm² free area), with or without a 15mm flange with a screw hole in each corner.
  • Air brick fitted to Rytons A1 Fire-rated 0.9mm Galvanised Steel Air Brick Plenum Adaptor, connected to Rytons A1 Fire-rated 0.9mm Galvanised Steel Rectangular Ducting 110mm x 54mm with Rytons Flat Channel Connector (RD4C) attached.  Overall length TBC (we recommend 100mm in addition to the measurement from the outer leaf to the inner leaf).
  • Spot welded.  Ever Build intumescent fire protection and acoustic sealant (product code FIREMATE) used on all gaps.
  • Metal air brick finished in a fire-rated RAL colour powder coating (achieving a test result of A2-s1, d0) in matt, semi-gloss* or gloss*.  * Subject to RAL colour.
  • Registered Design 6078058.
  • Rytons A1 Fire-rated Galvanised Steel Ducting Kit 204mm x 60mm.
  • Rytons A1 Fire-rated 0.9mm Galvanised Steel Metal Air Brick 215mm L x 60mm H (Return Grille: 7,200mm² free area, Square Holed: 9,032mm² free area, Hooded Louvre: 2,470mm² free area), with or without a 15mm flange with a screw hole in each corner.
  • Air brick fitted to Rytons A1 Fire-rated 0.9mm Galvanised Steel Air Brick Plenum Adaptor, connected to Rytons A1 Fire-rated 0.9mm Galvanised Steel Rectangular Ducting 204mm x 60mm with Rytons Flat Channel Connector (RD5C) attached.  Overall length TBC (we recommend 100mm in addition to the measurement from the outer leaf to the inner leaf).
  • Spot welded.  Ever Build intumescent fire protection and acoustic sealant (product code FIREMATE) used on all gaps.
  • Metal air brick finished in a fire-rated RAL colour powder coating (achieving a test result of A2-s1, d0) in matt, semi-gloss* or gloss*.  * Subject to RAL colour.
  • Registered Design 6078058.
Pressure Loss Data