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Water is heated in coffee machines. This releases calcium carbonate which is deposited as scale in the machine. Unfortunately, it is not possible to dispense entirely with the need to descale the coffee machine using chemical agents in all cases on smaller machines for domestic use. This is attributable to the fact that the pipes and valves in the coffee machines are frequently very thin. When the last portion of water runs through the machine, it evaporates directly and scale is left behind. When new coffee is then made, the quantity of new water frequently does not suffice to partially dissolve the old scale since the flow velocity is too low. Under normal conditions Merus is able to substantially prolong the intervals at which the coffee machine needs to be descaled. In the case of large industrial machines, it is frequently also the case that loose scale sludge collects at the bottom of the machine, and this can be removed simply during normal cleaning. Some customers have also reported that it has been possible to reduce coffee powder consumption by up to 15 %, depending on water quality.
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