Is it possible to fix the size of a duct on a vertical drop as I can't physically select the duct passing between floors?
Hi Duncan, thank you for your professional reply, I also asked Google a similar question and it led me to this thread. By the way, I want to ask you what you think about the solar whiz roof ventilation, is it worth buying? Actually, I just recently moved into a new house and I recently ordered solar panels to use as my main source of electricity. And I think that the solar whiz roof ventilation will look great on the roof of my new modern house. So, I found an article about the Solar Whiz on https://www.solarwhiz.com.au/whirlybird/whirlybirds/ to find out more information about it and I came to the conclusion that this is exactly what I need. Anyway, if you have any thoughts, please share them.
Cheers, Dan.