Chapter hvac engineering Fundamentals: Part 1 Introduction

3.5.4
Conduction and solar heat gain
through fenestration
Fenestration
is defined as any light-transmitting opening in the exte-
rior skin of a building. When light is transmitted, so is solar energy.
Up to the end of World War II, fenestrations almost always used
clear glass with outside shading by awnings or overhangs and inside
shading by roller shades, venetian blinds or draperies. With increased
use of air conditioning it was realized that solar heat gains through
this type of fenestration were as much as 25 to 30 percent of the total
Design Procedures: Part 1
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