Heizen mit Naturwaerme 02-2011_GB.indd - Viessmann
Heizen mit Naturwaerme 02-2011_GB.indd - Viessmann
Heizen mit Naturwaerme 02-2011_GB.indd - Viessmann
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Two thirds less fuel oil<br />
*Average value for 2009<br />
Initial state Dual mode system<br />
Oil boiler Oil boiler & Heat pump<br />
Output 18 kW 18 kW 9 kW<br />
SPF 100% 30% 70%<br />
Annual heat demand 32,400 kWh 9720 kWh 22,680 kWh<br />
Heating efficiency 90% 90% 330%<br />
Energy demand 36,000 kWh 10,800 kWh 6872 kWh<br />
Proportion of DHW 3000 kWh 3000 kWh –<br />
Energy consumption 3900 litre fuel oil 1380 litre fuel oil 6872 kWh electricity<br />
Energy price* €0.76 /l €0.76 /l €0.14/kWh (WP)<br />
Consumption costs* €2965 €1050 €960<br />
Total* €2965 €2010<br />
Savings (€) – approx. €950<br />
Example: Heating system with max. 55 °C flow temperature, 1800 full utilisation hours, 18 kW heat load of the building.<br />
DHW heating by the boiler. House with 150 m² and an annual heating energy consumption of approx. 39,000 kWh incl. DHW heating (3000 kWh).<br />
Benefits of dual mode systems:<br />
n Utilisation of the strengths of different heat sources<br />
n Reduction in consumption and running costs<br />
n Utilisation of free natural energy to a large extent<br />
n Reduction in environmentally damaging CO 2 emissions<br />
n High security of supply<br />
n Greater independence from fossil fuels<br />
n Reduction in hours run by existing systems<br />
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