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. Patent Pending. Product Code: A1RFDK220X90SQD. Download Drawing.
Quantity required per RAL colour in matt, semi-gloss or gloss finish achieving Class A2-s1, d0:
Overall length required (refer to drawing):
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