Abstract
In this paper we investigated indoor thermal environment of an office with multi-sprit type air conditioning system, and operating state of indoor units. The floor was divided to south and north area. The index "operating value" was defined by difference between inlet and outlet temperature of indoor unit, and measurement interval. Indoor temperature of each areawas almost the same. In cooling period, energy consumption of south area increased according to increase of operating value and outdoor temperature. However, energy consumption of north area was large without relating to operating value when outdoor temperature was 30〜35℃.
