Economic Effects of Lighting and Air Conditioning on Building Costs

In this paper, the control of comfort in the modern office building is discussed with particular emphasis on the thermal aspect. The thermal barrier is approached as higher levels of illumination are provided, particularly when all-air systems are involved. Since comfort can be provided only within the rather narrow limits of air temperature and volume, means of handling this lighting energy at the higher levels are discussed and reuse of the energy suggested. Considerable savings can be effected by the proper design of air-handling lighting fixtures and systems; relative costs are tabulated for a 10-story office building, and additional engineering ``extras'' are included.