BAL Rated Natural Ventilator

For over 25 years, the Hurricane® range vertical vane natural ventilation technology has been built to endure the tough climatic conditions and operating environments. Bradford Ventilation products are designed, engineered and manufactured at its ISO9001 accredited facility in Seven Hills, Australia.

Hurricane was the first industrial ventilator to incorporate vertical vane design which tests at University of Technology Sydney have shown to be have an improved co-efficient of discharge (Cd) compared to similar sized traditional spherical vents.

Hurricane range of Special Variations ventilators such as the BAL rated ventilator is designed for buildings in Bushfire Prone Vegetation Category 1 areas. It is designed to comply with the Deemed to Satisfy provisions of AS3959.

A list of case studies can be found here.

Features and benefits
Specification BAL
Roof mounted ventilators shall be Hurricane® BAL 300/400mm (model BAL 300/400) vertical vanes ventilators and shall be manufactured from non-combustible material such as standard aluminium, corrosion resistant marine grade aluminium or higher, aluminium shaft, aluminium bracket, aluminium rivets and stainless steel fasteners. The main bearing holder assembly shall be aluminium and not be in the line of air flow. Ventilator throat shall be fitted with CSR Bradford Ventilation fire rated protective corrosion resistant stainless steel ember guard that fits in to Bradford Ventilation bases with 2mm or less aperture size to restrict entry of embers into a building or roof space to meet the requirements of AS3959 in relation to Construction of Buildings in Bush Fire Prone area installation for ventilators. The ventilator tops shall be mill finished or powder coated with Colorbond® or as specified by the customer at time of confirmation. The ventilator shall be weather-tight under proper installation and normal operating conditions, and capable of withstanding a tested wind speed of 111.6km/hr. The ventilator shall be manufactured by CSR Bradford Ventilation of New South Wales (1800 332 332) including applicable bases, dampers, fixings, trims, straps, flashings and other specified fittings manufactured by CSR Bradford Ventilation as specified herein, or equivalent.
Contact our technical team
Specialist team:
(02) 8824 0444
Case studies

Browse our commercial & industrial case studies to see how Bradford Ventilation can help your project


A hybrid ventilator that works to ensure a constant supply of fresh air for commercial industrial buildings.