Chapter hvac engineering Fundamentals: Part 1 Introduction

12.11
Lighting Systems
Lighting design ranges from following a cookbook to a high-level art
form. It is not the responsibility of the HVAC designer, but lighting
imposes far-reaching consequences on the HVAC design. Nearly all
lighting is derived from electricity. Only a fraction of the power is
transformed to light, and virtually all the lighting-related energy is
released to the space or ceiling plenum, where it must be addressed
by the HVAC system. The HVAC designer should tell the lighting de-
sign team, and the other design team members, including the owner,
about the possible impact of lighting layouts on the HVAC system.
In the first half of the twentieth century, most lighting was of the
incandescent type. At that time, lighting levels were spartan, relative
to system cost, operating cost, and availability of power. With the ad-
vent of fluorescent lighting in roughly the time period of World War
II, it was perceived that productivity could be improved with increased
levels of lighting in the workplace. The 1950s and 1960s then became
a time of excess in lighting design, with high levels of illumination
Electrical Features of HVAC Systems
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