CH-95-01-2 -- Ventilation - Where it Came from, Where it is, and Where it is Going PDF

Ventilation is the process of supply or removing air by natural or mechanical means to or from any space. Such air may or may not be conditioned. In the past, ventilation air was not conditioned, and people relied on open windows and doors. People also used hand-held fans for ventilation. Discusses various types of ventilation throughout the years.

KEYWORDS: year 1995, ventilation, history, natural ventilation, mechanical ventilation.