The opening and closing of the shutters enables you to choose and control the shade desired. The patio cover protects your patio and outdoor furniture from rain. On a sunny winter day, your house can benefit from direct and natural sunlight (enabling energy saving and efficiency when heating and lighting your home). Protection from humidity During the summer you can control the amount of light desired (from 98% direct sunlight to 100% shade), enabling energy saving when air conditioning your home. The patio cover enables circulation of air throughout the year, while during the hot summer you enjoy air circulation and 100% shade at the same time.