Louvre windows work by maximising cross ventilation. There are no fixed panes or a small opening as we see in awning windows,Louvre windows work by maximising cross ventilation. There are no fixed panes or a small opening as we see in awning windows. The energy efficiency of any property relies heavily on the glass choice. Single glazing fails to deliver the thermal performance that double glazing or LOW-E glass offers. When assessing the performance of louvre windows in Sydney. https://windowsanddoorssuppliers.blogspot.com/2026/03/louvre-windows-energy-efficiency-guide.html