Drapes & Curtains
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The performance of drapes and curtains depends on how well they fit the window and how thick and insulative the fabric is, as well as its color. Well-fitting, double layer drapes can reduce solar gain by 33% and reduce heat loss by up to 10% in winter. They work best if they are backed with white, thermal or doubled up, and there are no gaps (hung close to the window, reach the floor or window sill, and overlap panels).