Find the cheapest home energy solution
Free calculators for heating, heat pumps and home energy. We show you the best option for your wallet, not the most expensive one, and how much you will pay for it.
Why EnergyWallet
Many decisions at home cost thousands. We help you choose exactly what you need, without overpaying.
Cheapest, not the most expensive
For example, when replacing cast-iron radiators for a heat pump, a longer K22 often does the same job as a pricier K33.
Simple and clear
We explain the formulas and assumptions in plain language, so you can see how the result is made.
Made for your phone
The calculators are built mobile-first: enter a few numbers and get an answer.
Calculators
We start with radiators, more calculators are coming soon.
Radiator conversion
Are your radiators enough for a heat pump, and what supply temperature do they need?
Heating costs and COP
Supply temperature and annual heating costs.
Heating methods compared
Heat pump, gas, firewood, pellets, district heating.
Solar panels and battery
Payback with a dynamic electricity tariff.
How it works
Enter your details
A few simple values about your home or radiators.
Get the answer
A clear conclusion and a comparison of options.
Talk to a specialist
Results are indicative, so consult an installer before deciding.
Start with radiators
In a minute you will know whether your radiators suit a heat pump.
Calculate now