Do Heat Pumps Increase Electricity Bills?
Many homeowners worry that installing a heat pump will dramatically increase their electricity bills. While electricity use does increase, the overall cost of heating depends on system efficiency and the energy source being replaced.
Yes, electricity use usually increases
Heat pumps run on electricity rather than gas, oil or LPG. This means the electricity consumption of the home will typically increase after installation.
However, this does not necessarily mean the total heating cost will increase by the same amount.
Why heat pumps can still be efficient
Heat pumps move heat rather than generating it through combustion.
Because of this, they can produce several units of heat for each unit of electricity consumed.
Example electricity consumption
Consider a home that requires around 12,000 kWh of heat per year.
If a heat pump operates with a seasonal efficiency (SCOP) of 3, the electricity used would be roughly:
4,000 kWh of electricity per year.
This electricity replaces the gas or oil previously used to heat the home.
What affects electricity use?
Electricity consumption varies significantly depending on the home and system design.
- Insulation levels
- Flow temperature
- Radiator sizing
- Heat pump efficiency
- Outdoor temperatures
Homes replacing oil or electric heating
In many homes currently using oil, LPG or electric heating, heat pumps can significantly reduce overall energy costs.
These systems often have higher fuel costs than heat pumps operating efficiently.
Electricity tariffs matter
Some electricity tariffs offer lower prices during off-peak periods.
Smart heat pump controls can sometimes take advantage of these tariffs to reduce running costs.
Try the HeatPick running cost calculator
To estimate potential electricity use and heating costs, try the HeatPick running cost calculator.
Key takeaway
Heat pumps usually increase electricity consumption, but they replace other fuels and can still provide efficient heating overall.