Rytons A1® Fire-rated Ducting Kit 204mm x 60mm 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 6085471. Patent Pending. Product Code: A1DK204X60RGD. Download Drawing.
Quantity required per RAL colour in matt, semi-gloss or gloss finish achieving Class A2-s1, d0:
Overall length required (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:
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