Another important economical factor of the technology might be the saving of carbon dioxide emissions beside its importance for climate protection measure. We assume the calculation parameters, that 1 kWh electric equals 1.000 g CO2 and 1 kWh thermal equals 300 g CO2. The CO2 savings are 33.8 t CO2/a (or 0.18 t CO2/a) for thermal and 16.9 t CO2/a (or 0.09 t CO2/a) for electrical, respectively [13].