The Evolution of Indoor Climate - Part II

Last week in this series we covered the evolution of heating and cooling technology in the US. This week we’ll wrap up by looking at ventilation, and the concept of the building envelope. Ventilation In the 19th century, one of the primary concerns about the indoor environment was getting sufficient ventilation. Scientific theory at the time held that without proper ventilation, carbon dioxide and other pollutants would build up in indoor air and cause it to become ‘vitiated’, in turn causing a variety of negative health effects. In 1836, the British doctor Richard Baron Howard wrote

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