I was thinking about it late last year.
My sun room extension gets hot on days like today and heats up the rest of the house.
I was looking at the ones sold at Bunnings.
https://www.bunnings.com.au/acol-200mm-black-ezylite-solar-roof-vent-fan_p0811064
https://www.bunnings.com.au/acol-sk...-ezylite-premium-solar-roof-vent-fan_p0811215
I put that purchase off and removed the roof sheets instead, replacing the roof insulation and also put an exterior blind on the window exposed to the sun.
That did the trick meaning I can go without using the aircon for longer before my double brick house heats up.
Mostly relying on ceiling fans.
Some roof ventilation sites I looked at mentioned in the EnergySmart booklet.
https://energysmartsaver.com.au/
www.SolarWhiz.com.au
www.Edmonds.com.au
www.Odyssey.com.au
http://solarbright.com.au/products/ventilation/roof-ventilation/
