Abstract: A device for measuring heat consumption in individual apartments in a centrally heated building. The device includes a temperature transducer for measuring the representative temperature in each apartment and an outside temperature transducer for measuring outside air temperature. A measuring pulse generator cyclically and sequentially supplies measuring pulses to the outdoor transducer and simultaneously to a selected one of the inside transducers. The outside temperature and selected inside temperature transducers generate electrical pulses corresponding to the temperatures measured by them. These pulses are supplied to a differential circuit which converts the electrical pulses into an electrical difference signal indicating the difference between inside and outside temperatures for the selected apartment.