The present application is generally directed to hydrated carbon material powder comprising carbon material and water and devices containing the same. The hydrated carbon material powder finds utility in any number of devices, for example, in electric double layer capacitance devices and batteries. Methods for making and use of the hydrated carbon material powder are also disclosed.

A fluid collecting box (1) for a heat exchanger comprises a receptacle (2) delimited by at least one side wall (6) and a bottom wall (4) comprising a plurality of first openings (20) substantially aligned in an elongation direction of the box (A-A), the receptacle being closed by a cover (8) having at least one second opening (22) for receiving a feed pipe. According to the invention, the second opening (22) has an elongate shape having a larger dimension in the elongation direction of the box (A-A). The invention also relates to a feed pipe having a shape appropriate for cooperating with the collecting box at the elongate-shaped second opening, as well as a heating, ventilation and/or air-conditioning device comprising both the feed pipe and the collecting box.