220 x 90mm Fire Airbrick Double Grille Ducting Kit 640mm Length (Cotswold Stone)

Cat. No. 56100CS

The Fire Airbrick Double Grille Ducting Kit provides a non‑combustible external‑wall termination for mechanical ventilation systems using 220×90 mm ducting. Its A1‑rated galvanised steel construction ensures compliance with Approved Document B and the Scottish Technical Handbook 2019, making it suitable for multi‑storey and high‑risk residential applications where non‑combustible materials are required.

Technical Details
This kit incorporates a 640 mm fire‑rated metal duct section paired with a double external grille for enhanced airflow performance. Manufactured from 0.9 mm electro‑galvanised steel, it features an A2‑s1,d0 polyester powder‑coated finish and a low‑resistance grille design to support efficient supply and extract ventilation. (Tested to BS EN 13141‑2:2010 and corrosion‑resistant to BS EN ISO 9227:2012.)

Fire Performance
Constructed from A1‑classified base material, the ducting kit offers exceptional fire resistance with a melting point of 1450–1520 °C, ensuring no contribution to fire spread. It meets the requirements for external wall penetrations in compliant ventilation designs under current UK building regulations.