Patent ID: 7720635

Claim:
A method for determining a connected heating load of a building heated by a heating system, the heating system being fired by fuel in a waste gas-generating manner, and an outside temperature as well as an inside temperature occurring for the building, comprising the following steps: determining fuel power, inside temperature, and combustion air temperature over time in each case within an observation period of a certain observation duration; measuring waste gas concentration parameters, waste gas temperature, and outside temperature over time in each case within the observation period; ascertaining an efficiency of the heating system over time from the waste gas concentration parameters, the waste gas temperature, and the combustion air temperature over time in each case within the observation period; ascertaining an average outside temperature and an average inside temperature within the observation period from the outside temperature and the inside temperature; ascertaining an average heating performance produced at the average outside temperature from the fuel power over time and the efficiency of the heating system over time within the observation period; ascertaining a maximum heating performance to be produced at a minimum outside temperature from the average heating performance, the minimum outside temperature, the average inside temperature, and the average outside temperature within the observation period; and ascertaining the connected heating load of the building from the maximum heating performance and the observation duration.