The design of this course is to examine the impact that buildings have on our environment, of how a building uses energy, of how energy flows within a building are quantified, and how building science and construction techniques control those flows. With that understanding in place the course will apply that knowledge to the unique demands of the wards of Historic Preservation whose both provenance and irreplaceable contribution to our historic legacy impose specific preservation requirements concerning architectural aesthetics, fabric, texture, and usage. A grasp of these principles and applications will provide valuable and necessary tools for future caretakers of our built legacy.