For students seeking to become BPI certified residential energy auditors or to understand the principles of energy auditing. Includes training in the principles of energy transfer, building envelopes, energy auditing, air leakage, insulation, windows and doors, heating systems, cooling systems, indoor air quality, lighting, appliances, and water heating. Students will gain the skills required to perform building inspections and make cost effective recommendations for improving energy efficiency. At the conclusion of this class students will be able to sit for the Building Performance Institute (BPI) theory written test for Building Analyst certification. REEN 161 is the next class for BPI preparation and field certification class. The candidate must pass the REEN 160 class (first twelve weeks of one semester) and BPI written theory test to proceed to REEN 161 (last four weeks of the same semester). Recommend co-requisite of REEN 161.