Step 1: Calculating the Heat Demand
Based on the room-by-room heating load, consumption-based values, or directly entered heating load of the building, as well as the system's full load hours, the annual heat demand of the building is determined.
Example:
8 kW heating load × 2,500 full load hours = 20,000 kWh/year
Step 2: Calculating the Electricity Demand
The annual heat demand is divided by the seasonal performance factor (SPF or Jahresarbeitszahl). The SPF is calculated from the COP value (e.g. A2/W35) multiplied by a correction factor, which can be defined within the heating system planning.
Note: A more precise calculation of the seasonal performance factor will be available soon.
Example:
20,000 kWh ÷ 4 = 5,000 kWh
Step 3: Calculating the Electricity Costs
The calculated electricity demand is multiplied by the current or projected electricity tariff. If a price is entered in the "Electricity Consumption" tab, this value will be used automatically. If a dedicated heat pump tariff has been activated and defined within the heating system planning, it will override the general tariff.
Example:
5,000 kWh × €0.30 = €1,500/year