Calculators
Pick a calculator and find out which solution will cost you the least.
Live
Radiator conversion
Cast-iron radiators → K11/K22/K33, minimum supply temperature and COP.
LiveHeating curve calculation
Enter your current heating curve and COP, and we will show what it would look like after changing radiators.
Coming soon
Heating costs and COP
Supply temperature → COP → annual heating costs.
Coming soon
Heating methods compared
Heat pump, gas, firewood, pellets, district heating.
Coming soon
House heat loss
A simplified heat loss estimate.
Coming soon
Solar panels and battery
Payback with a dynamic tariff (Nord Pool).
Coming soon
Insulation payback
How many years until wall or roof insulation pays for itself.