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 Approved. Product Code: A190DK220X90SQDF. Download Drawing.
Quantity required per RAL colour in matt, semi-gloss or gloss finish achieving Class A2-s1, d0:
Drop required from underside of duct to face of air brick (refer to drawing):
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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