This book is a contribution to reducing energy consumption related to the use of HVAC systems in residential and similar buildings, as it presents a modern technique for supplying air conditioning.The results presented in this book were obtained through the numerical and experimental research methodology developed to evaluate the use of vertical confluent impact jets in HVAC (Heating, Ventilation and Air Conditioning) systems. The numerical research was carried out using numerical simulation models and the experimental research was carried out using experimental tests in an unoccupied experimental chamber equipped with a system of vertical confluent impact jets.