Water-filled windows use sunlight to heat and cool buildings
British startup Water-Filled Glass has developed panes of glass filled with water that use sunlight to power a “crazy” energy-saving heating and cooling system. Founded in 2020 by Loughborough University architecture lecturer Matyas Gutai, Water-Filled Glass (WFG) aims to use patented technology to make heavily glazed buildings significantly more sustainable. Its windows contain a thin layer
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