MAXI ACCU COOL is suitable as a cold accumulator tank with 19 mm cellular rubber insulation. The insulation is diffusion-tight against the room air to prevent condensation from forming on the inside of the cold tank surface. MAXI ACCU COOL is suitable for room climate systems with cooling machines where the ice water tank constitutes a necessary buffer for the system. The excess heat from the cooling machinery can provide virtually free hot water, if an accumulator tank as a preheater is installed. For example, MAGC.