Asbestos cement exhaust ventilators and bases
Description
Situated on roof ridge, or on sloping roof within specific moulded base and AC sheet. Base section attached. Usually commercial or industrial buildings. Identical also produced in steel. Moulded internal AC shafts used.
Position on roof dictated by best position for receiving maximum wind force.
Drum diameters: 18”(45.8cm), 24”(61cm), 32”(81cm), and 44”(1.12m).
Corresponding base diameters: 9”(22.9cm), 12”(30.5cm), 16”(40.6cm) and 22”(55.9cm).
Years of production/use
Prior to 1990
Brands/products
- Durabestos
- Fibrolite
- Tasbestos
- Hopley
- Colt (Hardie)
- Fibrock
- Super-Six
- Asbestolite
Residential uses
- Garages, large sheds
Industrial uses
- Commercial offices attached to warehouse
- Warehouses, factories, foundries – structures where heat release was important
Be aware
Ventilation was based on flow-through effect. Asbestos dust/debris may have accumulated on interior structures including baffle.
