Rotating wheel dessicants employed in dehumidifying moisturized air present within a water-damaged building are themselves dehumidified to liberate collected moisture through the use of ambient air drawn over and about a heat exchanger fired by diesel fuel, with the rotating wheel dessicant being turned by a grip notch belt stretched onto the wheel. The controller calculates a detected load value based on an output value of the load detecting sensor and performs occupant determination based on the detected load value. Feedback messages are generated using the antenna array interface.