The invention relates to a system for heating two liquid products, for example milk and cream, which are each moved in a circuit, there being arranged in the milk-conducting circuit a preheater (4), a reheater (6) arranged downstream of the latter and a steam-loaded heater (7), through which elements the milk, as a heat-emitting medium, is guided and the milk heated in the heater (7) is guided, as a heat-emitting medium, first into the reheater (6) and then into the preheater (4) and is cooled in a cooler (9) after leaving the preheater (4). The heated milk leaving the preheater (4) has the cream taken from it in a cream separator (5) and the creamed milk is fed for heating into the reheater (6), a preheater (10) and a steam-loaded heater (11) arranged downstream being provided in the circuit receiving the cream, the heated cream being fed as a heat-receptive medium from the said heater (11) into the preheater (10) and being cooled in a cooler (14). The cream leaving the cream separator (5) is fed as a heat-emitting receptive into the preheater (10). The object of the invention is to improve the thermal efficiency of the system and to reduce the amount of power required by the cooling pumps. This object is achieved according to the invention in that a heat exchanger (13) is provided in the circuit receiving the cream, through which exchanger (13) the heated cream leaving the preheater (10) of this circuit is guided as a heat-emitting medium, and in that a subsidiary stream (15) of milk which is diverted upstream of the preheater (4) of the milk circuit is introduced into the heat exchanger (13) and mixed with the stream of milk fed into the cream separator (5). The ratio of the quantity of the subsidiary stream (15) of milk to the quantity of creamed milk is advantageously 1:1. <IMAGE>
