These are major selling points in an era characterized by skyrocketing energy costs, of course, but the authors point out that there are other advantages that accrue to the use of these natural ventilation techniques as well. People are naturally attuned to their environment and despite having worked in buildings with closed ventilation systems in the past, studies indicate that humans are more comfortable when there are minor fluctuations in the ambient temperate that reflect the corresponding weather outside, and natural ventilation restores this natural balance. There are a number of factors to be considered when designed buildings to take maximum advantage of natural ventilation resources, though, particularly when these natural ventilation techniques are used in combination with solar energy considerations, including the prevailing wind direction and speed, typical levels of humidity, positioning of the building and its contents in relationship to the sun, window placement, and so forth....

By taking advantage of whatever is available at a given building site, engineers and architects can help create a building that helps people become more productive while reducing initial building costs and providing enormous long-term savings in mechanical heating and ventilation systems. Indeed, the authors of "Natural Ventilation" emphasize that cost savings of between 50 and 100% can be achieved, and in some cases, air conditioning systems can be eliminated altogether.
All in all, the authors make a compelling case for using natural ventilation in buildings today. They cite a number of reasons to support their position, including reduced first costs and more importantly, significantly reduced operational costs throughout the building's existence. In the final analysis, natural ventilation appears to be an easy sell in today's energy-conscious environment, and it is reasonable to suggest that there are going to be more buildings that feature natural ventilations systems in the future.