This course explains how to install operate and maintain air conditioning and refrigeration systems following all applicable safety and environmental laws. We begin by comparing ‘heat’ and ‘temperatures’ and outlining the different forms of heat transfer found in the heating ventilation and air conditioning (HVAC) system. We then discuss joules the units used to measure heat energy and heat power before taking you through different forms of heat.The course then focuses on air conditioning systems. We first provide an overview of standard air conditions found at sea level. We then compare the different forms of air conditioning systems by examining calculations related to heat and fluid movement the air conditioning cycle and the main types of cooling systems. The course also explains how compressors water chillers and fans work in detail. We describe the role of various types of fans and identify the best models for specific environments.We establish the importance of refrigeration before going through the requirements and uses of refrigerants. The course highlights issues pertaining to the construction and installation of refrigeration and air conditioning systems. We also explain how the domestic refrigerator works and trace its impact on global food networks. Our final section covers indoor air quality and its effects on health and comfort. This course provides the training you need to work in air conditioning and refrigeration so sign up to take advantage of this opportunity to launch a lucrative HVAC career.