A heat exchanger used as an evaporator includes a refrigerant inlet header section having a refrigerant inlet at a right end portion, and a plurality of heat exchange tubes connected to the refrigerant inlet header section. Various modalities of treatment are possible including approaches for enhancing learning, and stimulating alertness and clearing emotions. Run-time instrumentation information of the executing instruction stream is captured by the processor. A projector processor interfaced with the network module reads the lamp usage and projector identification information from firmware of the projector and provides the lamp usage and projector identification information to the lamp management module for automatic generation of the lamp order form display. The chassis connected abutment is carried by an arm that is movable relative to the chassis and anchored by a tie bar. A pair of extension members traverses the first opening and the second opening.