Recommended if you already know the living space, building standard, and PV data (if applicable).
1) Reference Case
Object: Detached house, very good efficiency standard, 82 m² living space. Usage: all rooms constantly 22 °C (24/7). Hot water: external (instantaneous water heater), not included. PV: 10 kWp installed.
Classification: With very low heating loads, the
overall economic efficiency (investment + operation + PV + funding) often plays a greater role than a pure percentage discussion.
Under certain conditions: yes. Eligibility for funding often results from the
building standard achieved (overall concept) – not necessarily from an individual measure "heating".
The respectively valid funding conditions and evidence in individual cases are decisive.
Why do you consider kWh/year and not just efficiency indicators?
Customers pay for the kWh that arrive at the meter. Especially with very low heating loads, the absolute
amount of energy is small – then the overall calculation of investment and operation is decisive.
Does the result apply to every building?
No. This is a building-specific example. With a higher heating load, different area, different
usage profile, or without PV, the result may differ. Individual planning is recommended.
Would you like your own numbers?
Send us a brief description of the living space, building standard, and PV status – we will create an individual assessment.
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"name": "Warum betrachten Sie kWh/Jahr und nicht nur Effizienzkennzahlen?",
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"text": "Kunden zahlen die kWh, die am Zähler ankommen. Gerade bei sehr niedriger Heizlast ist die absolute Energiemenge klein – dann ist die Gesamtrechnung aus Investition und Betrieb entscheidend."
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"text": "Nein. Dies ist eine gebäudespezifische Beispielbetrachtung. Bei höherer Heizlast, anderer Fläche, anderem Nutzungsprofil oder ohne PV kann das Ergebnis abweichen. Eine individuelle Planung wird empfohlen."
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