A method for actuating an electrically dimmable mirror in which a predefined degree of dimming of the mirror is set by charging or discharging the mirror to a predefined setpoint voltage. These microcracks are caused by strain or stresses due to lattice mismatch and thermal expansion coefficient differences between materials and substrate’s. These steps are addressed by one of three approaches: multi-cursor, outer union, or hybrid. The first panel can be strategically left in place for blocking access to at least a portion of a step band near a turnaround. In certain configurations, the transmitter is configured to transmit a predetermined number of symbol blocks within a transmit time interval. A conduit for supplying water to the outer water tanks can be wrapped around the downstream end of the flue pipe in a spiral manner to preheat the water prior to feeding to the water tanks.