<ul><li>Physics research by Adrian Bejan and Pezhman Mardanpour reveals that the shape of a roof can significantly impact the energy efficiency of a building.</li><li>For shorter roofs, the best design is to make the roof three or four times wider than it is tall.</li><li>For taller roofs, equilateral triangle shape, where the height and width are equal, is the most effective design.</li><li>Old homes around the world, including Italy, already follow these energy-efficient roof shapes, highlighting the importance of understanding the impact of building shape on energy efficiency.</li></ul>

Physics shows the perfect roof shape for energy efficiency

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