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Abstract

Green roofs provide energy and cost savings during summer by insulating buildings and therefore keeping them cooler . Most prior studies have used only roof area to calculate the energy savings of green roofs . T his study observed four physical models for 54 days to ascertain how building geometry and compactness impact indoor temperature on buildings where a green roof has been installed . Indoor temperature was decreased due to green roof implementation by 8 .1°C on a less compact building compared to 4 .6°C on a more compact building . These results are more apparent on warm days . Less compact buildings have a larger relative roof size compared to the surface area of the building and thus, the impact of a green roof is more pronounced on less compact buildings . T he results suggest that building compactness can be a criterion to determine the buildings that will benefit the most from installing a green roof

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