Braham, William2023-05-222023-05-222005-01-012008-08-15https://repository.upenn.edu/handle/20.500.14332/1715This paper provides a summary analysis of the typological and historical development of active glass walls. From the beginning of the glass revolution, the fascination with large areas of transparency has been tempered by the negative environmental effects they can produce: excessive heat loss when it is cold, excessive heat gain when the sun shines, and even excessive daylighting.Presentation