This subject provides a first course in thermo-sciences for students primarily interested in architecture and building technology. It introduces the fundamentals important to energy, ventilation, air conditioning and comfort in buildings. It includes a detailed treatment of different forms of energy, energy conservation, properties of gases and liquids, air-water vapor mixtures and performance limits for air conditioning and power producing systems. Heat transfer principles are introduced with applications to energy losses from a building envelope. The subject is a prerequisite for more advanced thermo-science subjects in Architecture and Mechanical Engineering.