This book contains fourteen chapters on the themes revolve in the following: Introduction, measures the properties of air, the distribution of air ventilation, and the means and devices to control ventilation, natural ventilation, cooling Altbjeri, the effects of thermal and gas environment on the farm animals and poultry, ventilation systems installations farm animals and poultry and topics that task. This book is generally comprehensive and in depth knowledge of the concepts of environmental and abundance of basic information, as well as in aspects of scientific and applied multiple.