Abstract: An apparatus includes a housing and at least one heat-generating electrical module. The housing includes a floor and at least one sidewall portion extending around the floor's perimeter. The sidewall portion(s) includes an air intake section located at a first end of the floor and a first air exhaust section located at a second end of the floor. The floor includes two noncoplanar floor portions and a transition portion interconnecting them. The transition portion, which may be angled, includes a second air exhaust section. The heat-generating module(s) are positioned over and spaced apart from the floor. At least one air flow channel is defined between inside surfaces of the floor and external surfaces of the heat-generating module(s). The apparatus may also include one or more fans that draw air in through the air intake section and force air through the air flow channel(s) and out the air exhaust sections.