Fire resistant extractor

The fire-resistant extractor fan system with metal components and ducting addresses the failure of conventional fans to meet BAL-40 standards by preventing ember and flame ingress, ensuring structural integrity and safety during bushfires.

WO2026112681A1PCT designated stage Publication Date: 2026-06-04TPA APPLIANCE GROUP PTY LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TPA APPLIANCE GROUP PTY LTD
Filing Date
2024-11-27
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Conventional roof-mounted extractor fans in bushfire-prone areas fail to meet Bushfire Attack Level 40 (BAL-40) certification due to inadequate fire resistance, with plastic components melting or igniting, and metal mesh guards not providing sufficient ember protection, risking structural damage and fire ingress during bushfires.

Method used

The fan system features a metal cap and housing, metal mesh with 2 mm or less apertures, metal non-return flap, fire-resistant flexible steel duct, and metal-sheathed wiring, along with galvanized metal or ceramic components to withstand high temperatures and prevent ember and flame ingress.

Benefits of technology

The system achieves BAL-40 certification by providing robust fire protection, preventing ember and flame entry, and ensuring the fan and ducting remain functional during extreme heat events, thus safeguarding homes from fire hazards.

✦ Generated by Eureka AI based on patent content.

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Abstract

An extractor fan (125) suitable for installation on the exterior (103) of a house in areas at risk of bush fires, the fan having a fire proof cap and fire proof housing and an outlet therefrom covered with a metal mesh having a mesh size of 2 mm or less. All electrical wiring to and within the fan is sheathed with metal to prevent the escape of melted or burning insulation in the event of a bush fire. A metal non return flap is located at the base of the fan unit and above a metal chimney portion connected to the fan unit. The chimney unit is designed to fit within a reinforcing metal plate to be secured to the roof to protect an aperture cut in the roof for the insertion of the chimney therethrough. When installed the lower portion of the chimney (inside the house) is connected to a fire-resistant flexible steel duct (102) having at least two horizontal runs (111, 112) between the chimney and an internal extractor hood.
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