Proper ventilation systems in a chicken coop are necessary for keeping ammonia, carbondioxide, stagnant air, and moist air out, and maintaining a healthy internal environment. Ventilation aids to remove waste and control temperature and moisture within the coop. The different types of ventilation include natural ventilation, which uses windows and vents, and mechanical ventilation utilizing fans. Preventing air space contamination, while simultaneously guarding against bacterial infestation and lowering the chances of respiratory infections are made possible by a well planned chicken coop ventilation system.