Savings calculator
What does that mean for you?
A few inputs are enough for a first estimate — everything else is pre-filled with typical values. You’ll see immediately what COR.set saves compared to your current heating — in euros and in CO₂. For context: per kilowatt hour, heating oil currently costs roughly double the price of pellets, natural gas in existing contracts up to twice as much (price assumptions reviewed in October 2026).
Villa, large property or high heat demand? Then you may need several COR.set systems.
Open the large-property calculatorYour home
All values are pre-set with typical assumptions — simply adjust them.
How do you heat today?
Your current heating cost (optional)
Know your real figures? Then we use those instead of the model — much more precise.
Building standard
Rooftop photovoltaics
Existing PV counts in both cases (it doesn’t change the comparison). Planned PV is the extra benefit with COR.
Up to 30 kWp per entry. For larger systems, use the calculator for large properties.
Your electricity tariff
We calculate with a full year of hourly spot prices, plus grid charges and levies. If you have a fixed price, choose “Fixed price”.
Your current electricity use (optional)
Household electricity per year, excluding EV charging and heating electricity (heat pump). If you know it, we calculate with it instead of the estimate.
System
COR.boost (supplementary heat for peaks)
COR.boost is in final product tuning — the values shown are indicative.
Your result
Simulation running…