The goal of this project was to design a library that was efficient in creating a constant temperature throughout the building while using only passive techniques. The other limiting factors were the environment, Seattle which is usually overcast, as well as the site of our building which is surrounded by three buildings limiting the amount of open walls we have. To effeciently use the limited sunlight we needed to capture the sun in a spot that would always be affected which is on top of the building. We created a glass form which was then filled with water and had a large surface area. This would allow for the heat to be captured during the day and trapped inside the water. Once the temperature begins to drop the heat that is stored inside the water will dissipate into the building keeping it at a comfortable temperature. For the circulation of our building we tried to use the Bernoulli effect. The wind will come from the front of the building (South) and enter through the bottom floor which will create a difference of air pressure, so when the air reaches the exposed staircase it will be forced up and back outside. Utilizing the surrounding buildings, the thermal envelope of our building was three walls of solid concrete and then one exposed glass curtain wall “inslulated” by book shelves. This allows for any heat that is brought inside the building to remain inside without using machines. As our building is South facing, it will be receiving a lot of natural light directly onto the façade, so to both limit the temperature as well as the natural light we used the staggering of various floors to create a sunshade. Finally, by creating a constant changing of the temperature in the building, the air inside will be moving creating circulation inside this library. We plan to develop this further by studying how well the glass form retains and then dissipates heat, as well as studying if the books can act as a thermal insulator for our building.