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1. A machine to prepare beverages comprising: at least one tank for water, fluidly connected to a filtering container arranged to contain an aromatic mixture; a pump to feed water from said tank; a heating device to heat the water in transit; temperature sensors to detect a temperature of the heated water and a control and command unit operatively coupled to a memory and connected to a user interface comprising boiling temperature indicator means configured to determine an actual water boiling temperature value provided to the control unit when a value of a derivative of a temperature growth curve approaches zero and using temperature sensors monitors in real time the temperature growth curve of the temperature of the water for preparing the beverage, and to provide said control and command unit with information on the actual water boiling temperature value, wherein said control and command unit is configured to regulate at least the functioning of the heating device as a function of a heating speed and of said actual water boiling temperature value, correlated to an ambient pressure surrounding the machine itself, so that the temperature of the water for preparing the beverage remains below a safety temperature value lower than said actual boiling temperature value.
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