Heat pump power consumption: costs and savings

Heat pump power consumption

Heat pumps are a highly energy-efficient heating and cooling solution, producing several units of heat for every unit of electricity used (SCOP), extracting energy from air, water or ground to provide heating, cooling and hot water.

They draw up to 75% of their energy from ambient heat in the air, water or ground, with the remainder powered by electricity to run the compressor and system components — but this does not necessarily mean high electricity bills.

Electricity consumption depends on several factors, including:

• climate conditions
• home size and insulation
• heating, cooling and hot water demand

Ultimately, efficient consumption depends on choosing the right system, correct installation and proper use.

Heat pump efficiency - SCOP explained

Heat pump electricity consumption is based on what's known as the Seasonal Coefficient of Performance (SCOP), which allows for variation in performance across a year. A heat pump has to work harder in the winter than in the summer.

The SCOP is calculated by measuring the energy put in (electricity) and the energy (heat) put out. A heat pump typically produces 4 kWh of heat from 1 kWh of electrical energy, which can be cheaper than gas over a year. And there are ways to boost efficiency further.

Insulation affects the efficiency of any heating system. Ensure all your walls, loft cavities and windows are properly insulated to reduce your heating demand — and therefore the heat pump’s electricity consumption.

You can also minimise consumption by:

• making sure the heat pump is properly set up and adjusted for your heating system
• keeping the temperature relatively constant rather than turning it down significantly at night
• restricting the flow temperature of the heating water to a comfortable level
• regularly maintaining your system

To maximise efficiency and reduce electricity use further, consider combining a heat pump with systems such as underfloor heating or solar panels.

How much electricity does a heat pump use?

Putting numbers on electricity use helps put heat pumps into context. A mid-size air-source heat pump can consume around 6–10 kWh per day under typical conditions, which amounts to roughly 180–300 kWh per month.

On an annual basis, a medium-use household’s heat pump might use around 4,000 kWh for space heating and hot water. The total depends on usage habits, home size, insulation quality and climate.

At first glance, that may seem significant. But the key is efficiency. A heat pump typically delivers three to four units of heat for every unit of electricity consumed. By comparison, a gas or oil boiler produces roughly one unit of heat per unit of fuel burned. Studies indicate that heat pumps can result in around 30–50% lower CO₂ emissions than comparable gas or oil heating systems, depending on the electricity mix and other system conditions.

The cost of running a heat pump

According to 2025 data from Eurostat, the average electricity price for EU households is about €0.287 per kWh, though this varies widely between countries.

In higher-cost countries such as Germany, Denmark and Belgium, prices can reach €0.35 per kWh or more, while in other regions electricity may be significantly cheaper.

As a result, annual running costs can vary:

• from a few hundred euros in lower-cost countries
• to over €1,500 in higher-cost regions

Running costs depend on:

• climate (colder regions increase usage)
• insulation quality
• hot water demand
• system sizing and efficiency

Looking ahead, electricity prices may stabilise as renewable energy expands, while fossil fuel prices remain volatile — further strengthening the case for heat pumps.

Boost efficiency with smart thermostat control

One of the most effective ways to reduce heat pump electricity use is controlling when and how it runs. Smart thermostats and zoning systems allow you to:

• heat only the rooms you use
• maintain stable temperatures
• avoid unnecessary compressor cycles

Keeping the temperature stable, rather than frequently adjusting it, helps reduce energy consumption. Lower flow temperatures (the temperature of the water circulating through radiators or underfloor heating) reduce system workload on the heat pump, improving SCOP and reducing kWh draw.

In practice, this means programming the system to gently maintain comfort during the day, perhaps lowering slightly overnight, rather than blasting heat only when the house feels cold. Over time, this leads to more consistent energy use and lower running costs.

Seasonal settings: summer vs. winter adjustments

Heat pumps do not operate the same way year-round.

In summer, usage focuses more on hot water and cooling. During colder months, the heat pump naturally works harder because outside air is colder. This means electricity consumption and running costs will increase. Ground-source heat pumps, however, maintain consistent efficiency throughout the year because ground temperatures remain stable.

Adjusting settings seasonally can reduce electricity draw. For example, lowering the hot water flow temperature or reducing radiator and hot water cycles when ambient temperatures are mild reduces how hard the compressor works.

A dynamic control strategy, adjusting flow temperatures, hot water timing and thermostat settings across seasons, helps keep efficiency high and bills under control.

Reduce heat loss at home

A heat pump’s efficiency depends heavily on the building itself.

To reduce heat loss:

• seal drafts around windows and doors
• upgrade to double or triple glazing
• insulate lofts, walls and floors

These measures reduce the workload on the heat pump, improving both comfort and energy efficiency.

Maintenance tips to lower power use

Just like any heating system, a heat pump requires regular maintenance to stay efficient.

Filters should be cleaned or replaced to ensure proper airflow. Blocked filters force the system to work harder, increasing electricity consumption.

Annual professional servicing — including refrigerant checks and system calibration — ensures optimal performance. Neglecting maintenance can increase energy use by up to 25%.

Optimise hot water usage

If your heat pump also supplies hot water, inefficiencies here can significantly inflate electricity consumption.

To improve efficiency:

• Use a separate domestic hot water tank with timers, limiting heating to periods when hot water is needed.
• Setting the hot water temperature more modestly, for example 50-55°C instead of 65°C, can reduce electricity demand while still meeting daily needs safely.
• Reduce unnecessary water usage with shorter showers, low-flow taps and fixtures.

Over time, this helps reduce both kWh consumption and running costs.

Realistic savings compared to gas or oil heating

Heat pumps can be more energy-efficient than traditional gas and oil heating systems, and are also more efficient than direct-electric heating because they transfer heat rather than generate it directly. A standard heat pump runs at a Seasonal Coefficient of Performance around 4, meaning roughly 400% efficiency overall.

This higher efficiency often translates into substantial energy bill reductions. Compared to an older gas boiler or direct-electric heaters, homeowners may see savings of 20-50%, depending on factors such as the insulation of the home, how intensively the heating is used, and the relative price of electricity versus gas or oil in the local market.

When grants or subsidies are taken into account, plus the reduced running cost, the long-term return on investment and payback period can make a heat pump system financially attractive.

Choosing the right tariff for your heat pump

Electricity tariff plays a key role in overall costs.

Running a heat pump on a standard rate might erode part of its efficiency advantage, especially when electricity is expensive. Smart or time-of-use tariffs, where electricity is cheaper during off-peak hours, can maximise savings.
For example, shifting heat pump use (heating or hot water) to cheaper periods could save a typical home between €460 and €1,350 per year compared to a standard tariff.

Solar panels or battery storage can further reduce reliance on grid electricity, thus lowering bills and improving return on investment.

Heat pump and solar panels

Combining a heat pump with solar panels improves efficiency and reduces reliance on grid electricity.

In summer, solar panels can power the heat pump without relying on the electrical grid. During winter when the sun shines less, the benefit of solar panels is less pronounced, though a heat pump will still be able to use solar energy to provide heating.

A heat pump can achieve a SCOP of four or more units of heat for every unit of electricity consumed. Combining it with solar panels can increase the use of self-generated electricity and potentially reduce operating costs.

Considerations for cold climates

Heat pumps must work harder in cold weather, which can reduce their efficiency (lower SCOP) and increase electricity use. However, modern systems can operate efficiently down to -28°C, making them suitable even for extremely cold regions.

In very cold climates or poorly insulated homes, it may be sensible to combine a heat pump with a supplemental or hybrid system, for instance a resistive backup heater, to ensure reliability and comfort. Whilst not always necessary, this hybrid approach can mitigate performance dips during extreme cold.

How to monitor and improve energy usage

To stay on top of energy use, consider energy monitoring tools or smart meters to track real-time kWh consumption of the heat pump. This enables you to spot inefficiencies or anomalies, for example unusually high use when the house is empty, or inefficient hot water cycles.

By setting benchmarks (for example, a target of 4 heat kWh output per 1 kWh electricity), actual performance can be compared against expected CoP and issues can be flagged to an installer or technician.

Regularly reviewing performance, particularly after seasonal changes, insulation upgrades or usage changes, helps keep the system efficient and savings consistent.

Energy-saving upgrades to complement your heat pump

A heat pump delivers best results when the building itself is energy efficient.

Complementary upgrades include:

• Improved insulation (walls, roof, loft), double or triple glazing, draught sealing and underfloor insulation to reduce heat loss and lower electricity use
• Mechanical ventilation with heat recovery (MVHR) to minimise heat loss through ventilation while maintaining indoor air quality
• Solar thermal systems to support efficient domestic hot water production
• Battery storage, when paired with solar PV, to store excess energy and reduce reliance on the grid

These measures reduce demand and improve overall system efficiency.

Optimising radiators and underfloor heating

Heat pumps work best with low-temperature systems, such as underfloor heating or low-temperature radiators, because these systems allow the flow water temperature to stay lower whilst still providing adequate comfort.

Underfloor heating is often ideal because it provides uniform, gentle heat at lower water temperatures, reducing the workload on the heat pump and improving SCOP. If homeowners retain traditional radiators, it may be necessary to upgrade them (larger radiators, lower flow temperature) to maintain comfort without pushing the heat pump to high operating temperatures, which would eat into efficiency and savings.

Grants and government support

Many countries offer financial support for heat pump installation.

Such grants can substantially reduce the payback period, making heat pumps more accessible. After grants, the total cost of installation and equipment may approach that of conventional heating systems, especially for modestly sized or well-insulated homes.

Heat pump power consumption: what you need to know

Heat pumps offer a compelling combination of high energy efficiency (up to 4 kWh of heat per kWh of electricity), lower CO₂ emissions, and tangible cost savings when installed and used correctly. Their performance depends on proper sizing, professional installation, good insulation, smart controls, and thoughtful operation. When these conditions are met - and ideally when paired with renewable electricity, like solar panels, and suitable tariffs - heat pumps become a powerful tool for reducing energy bills while improving environmental impact compared to oil or gas.

Key takeaways

• Heat pumps typically produce 4 kWh of heat per 1 kWh of electricity
• Running costs depend on electricity price and home efficiency
• Smart controls and insulation reduce consumption
• Solar panels further improve savings
• Modern systems perform even in cold climates

Ready to reduce your energy consumption and improve efficiency?