This course deals with site and building systems and their impact on both design and ecological processes. The primary focus of this course is the study of basic principles of sustainability, climate considerations in architectural design and energy and material flows in the construction and operation of buildings. Students are introduced to basic scientific concepts of the thermal and luminous behavior of buildings and will gain proficiency in the use of a range of technologies and tools for the design of “high comfort spaces” that have a “minimum environmental impact”. Students will be challenged to apply these techniques and explore the role that energy, light and sustainability in general can play in shaping architecture. Following a review of how to analyze a site’s climate and local energy potentials, the first part of the course will introduce students to the art and science of naturally lighting buildings. The second part of the course is dedicated to the principles of heat and mass transfer in buildings. Along with hands on exercises and experiments, methods to assess envelope transmission losses, natural ventilation and radiative heat transfer are introduced. The course format consists of weekly input lectures and a lab session. Individual and group assignments, as well as in-class presentations and exercises, will help students study the use of environmental technologies in contemporary buildings.