A measuring arrangement comprising a heat meter having a flow sensor, a first temperature sensor, a second temperature sensor and computing means. The first temperature sensor serves to register a temperature in the feed line of the heat exchanger and the second temperature sensor serves to register a temperature in the drain line of the heat exchanger. The computing means serves to calculate the amount of heat exchanged. A first transfer function, which serves to determine the temperature in the feed line based on a measurement signal of the first temperature sensor, is stored in the computing means; a second transfer function is stored in the computing means; wherein the first transfer function differs from the second transfer function; and the second transfer function serves to determine the temperature in the drain line based on a measurement signal of the second temperature sensor.