A water-cooled air conditioning system using a regenerative condenser water circuit to reheat the supply air during a dehumidification mode. The upper member has a substantially rectilinear configuration and is arranged to slope upward in a rearward direction of the vehicle body so that a load applied to a front end portion of the upper member can be born by the front pillar. Each speed-up gear shaft includes a pinion and a gear mounted thereto. In another aspect, the at least two capacitors are at least four capacitors arrayed in a rectangular array generally parallel to the substrate. The computer can then generate statistical graphs to show the status data.