Consider a simple building that is a rectangular prism, with wood-frame construction. You are working with a client who would like you to consider different energy conservation measures (ECM) to retrofit her house to save energy in an economical way. Beginning from an initial building design, the 'reference' state, evaluate the addition of energy saving alternatives and their influence on the building heat transmission coefficient, Ktot, and the energy use, and payback time. Finally, you will make a recommendation