of these upper passages such as the upper passages 55 a 55 b and 55 c can be of various configurations such as dependent upon the particular use or application so long as the upper passages such as the upper passages 55 a 55 b and 55 c can receive the coolant and can permit or facilitate the flow of the cooled coolant such as water or other coolant from the coolant tank 12 such as to a location an area e g building interior etc a structure or a device requiring cooling for example where separate passages or ports are provided such as the upper passages 55 a 55 b and 55 c the more distal ports are desirably somewhat larger in diameter than the ports or passages relatively closer to the second coolant manifold 52 in order to assist in relatively more evenly distributing flow of the coolant from the coolant tank 12 for example in this regard as illustrated in fig7 the upper passage 55 a has a diameter d 1 that is larger than a diameter d 2 of the upper passage 55 b and the upper passage 55 b has the diameter d 2 that is larger than a.