The maintenance of equipments of the buildings is important for making high-quality building as social capital up. However in the present condition, in order that economic value of the maintenance may not be evaluated, an efficiency maintenance is not performed in almost buildings, especially, the maintenace of air-conditioning automatic-cntrol system. In this thesis, the economic value in maintenance of air-conditioning automatic-control system is evaluated from the theory that the maintenance effect is equivalent to the amount of a loss due to the poor performance of economic value of comfortable air-conditioning system and the effect of the energy-saving by the automatic-control system. Finally, economical evaluation of maintenance of an automatic-control system is simulated.
