Passive solar design is essentially designing a structure to work with the environment to cool and heat the house with little to no fossil fuel energy assistance. There are many different options to choose from with passive solar design but the one that will be featured in this idea is a sunspace. From the positioning of the house on the landscape to the angles of the eaves and the direction of the windows, a house that uses a sunspace can significantly cut down on energy use and costs. Also known as isolated gain. The sunspace is a practical solution for anyone who wishes to make a shift towards more planet friendly living.