Energy efficiency results from proper building practices as well as the correct appropriation of mechanical and electrical systems. The use of deep overhangs to block harsh sunlight and rain from windows is one practical method that contributes to energy efficency and sustainability. Solar heat gain, which significantly affects indoor air temperature, is reduced a great deal by shading windows. As a result, less energy is wasted cooling the house. Deep overhangs also block constant rain exposure which extends the life of window systems. Click on the pictures to the left for more examples.