A method for increasing the utilisation rate of a heat generator in a heating system which produces heat from final energy and heats a heat transfer medium circulating in a pipe circuit made up of a feed line and a return line in the heating system, in which the following process stage are performed in succession or in a switched series in which process stages (a) and (b) and also (d) and (e) and also (f) and (g) and (h) are each switched in their sequence: (a) measurement of the feed temperature (θ V) and the return temperature (θ R) of the heat transfer medium in the heating system; (b) determination of a supply state value which defines the heat requirement in a building and indicates the heat requirement to be covered by the heating system of the heat consumer attached to the pipe circuit of the heating system, and examination of whether the supply state value lies within a predefined value range which allows a lowering of the feed temperature (θ V) without the heating system exhibiting an undersupply state; (c) lowering of the feed temperature (θ V) by a predetermined feed temperature decrement (Δθ V,dec) and waiting for a change time period which is measured in such a manner that the change in the feed temperature (Δθ V) has an impact in the heating system; (d) measurement of the return temperature (θ V) and determination of the return temperature change (Δθ R) following the change in the feed temperature (θ V); (e) determination of a supply state value following the change in the feed temperature (θ V); (f) examination of whether the return flow temperature change (Δθ R) is smaller than zero and whether the supply state value lies within the predefined value range, wherein the method in this case is continued with process state (c); (g) examination of whether the return flow temperature change (Δθ R) is greater than zero, wherein in this case the feed temperature (θ V) is increased by a feed temperature increment (Δθ V,inc), a change time period is waited for and the method is continued with process stage (d); (h) examination of whether the supply state value lies outside the predefined value range, wherein in this case the feed temperature (θ V) is increased by a feed temperature increment (Δθ V,inc), a change time period is waited for and the method is continued with process stage (d). (a) measurement of the feed temperature (θ V) and the return temperature (θ R) of the heat transfer medium in the heating system; (b) determination of a supply state value which defines the heat requirement in a building and indicates the heat requirement to be covered by the heating system of the heat consumer attached to the pipe circuit of the heating system, and examination of whether the supply state value lies within a predefined value range which allows a lowering of the feed temperature (θ V) without the heating system exhibiting an undersupply state; (c) lowering of the feed temperature (θ V) by a predetermined feed temperature decrement (Δθ V,dec) and waiting for a change time period which is measured in such a manner that the change in the feed temperature (Δθ V) has an impact in the heating system; (d) measurement of the return temperature (θ V) and determination of the return temperature change (Δθ R) following the change in the feed temperature (θ V); (e) determination of a supply state value following the change in the feed temperature (θ V); (f) examination of whether the return flow temperature change (Δθ R) is smaller than zero and whether the supply state value lies within the predefined value range, wherein the method in this case is continued with process state (c); (g) examination of whether the return flow temperature change (Δθ R) is greater than zero, wherein in this case the feed temperature (θ V) is increased by a feed temperature increment (Δθ V,inc), a change time period is waited for and the method is continued with process stage (d); (h) examination of whether the supply state value lies outside the predefined value range, wherein in this case the feed temperature (θ V) is increased by a feed temperature increment (Δθ V,inc), a change time period is waited for and the method is continued with process stage (d).