In one aspect of the present invention, a top sizer is provided for use in combination with a garment hanger having a body and a hook member. An n-type GaN separate confinement heterostructure is on said n-type SLS and an InGaN multiple quantum well active region is on the n-type SCH. A control unit controls a duty cycle of the switching element according to the adjustment signal, thereby adjusting the voltage difference between the rectified voltage and the DC output voltage. If utility power is present and the self-check passes, the EVCS resets and provides power from the main utility to the charging connector. The boiler includes side walls inter-connected by stay-plates placed between the heat exchanger modules and top and bottom walls and end walls fitted with reinforcing elements which prevent their deformation due to the pressure of working fluid.