A well-made building remains ineffective without proper ventilation facilities. A badly ventilated house creates dampness and suffocating atmosphere. It is also very necessary to reduce the products of combustion and contaminants in the air.
Proper ventilation brings freshness in the house. Artificial ventilation is the one in which some mechanical arrangements are made to increase the rate of airflow. This technique is more useful for large buildings and theatres.
For natural ventilation, the inlet opening in the building should be equipped for effective air circulation. This system is very costly but improves conditions of working. If this is not enough then you can also make small doors at least an inch above the ground so that air circulation can happen.