Eco heating: the comparison we read too quickly
Hello, Benjamin here.
To reduce your expenses over the long term, compare installation costs, energy consumption, and maintenance: a heat pump is often a good option, but only if it suits your home.
A price table doesn’t tell the whole story. Thermal insulation, your existing system, and your usage can all change the outcome.
What to do now
- Check whether your home already has water radiators or underfloor heating.
- Check the insulation and any heat loss before choosing a system.
- Request estimates that break down purchase, installation, maintenance, and energy consumption costs.
- Compare seasonal efficiency, not just the stated output.
- Find out which grants are available and how much you could receive for your project.
A useful heating comparison starts with these factors, rather than a one-size-fits-all ranking. To narrow down your choice, also see our guide to heating systems that are worth considering and our advice on heating a poorly insulated home.
Comparison of energy-efficient heating systems: costs and performance
The upfront cost gives you an initial indication, but your bills depend mainly on energy efficiency, energy prices, and your home’s heating needs. The figures below are estimates: the specifics of the installation and the equipment selected can affect the cost.
| System | Estimated installation cost | Key takeaway |
|---|---|---|
| Electric radiator | About €200 to €800 per unit | Affordable to buy, but potentially expensive to run if heating an entire house. |
| Gas condensing boiler | About €3,500 to €4,700 | May suit an existing system, but bills depend on gas prices and regular maintenance is required. |
| Air-to-air heat pump | About €4,000 to €10,000 | Suitable for some homes without central heating; it can also cool the home in summer. |
| Air-to-water heat pump | About €8,000 to €16,000 | Worth considering if the home has water radiators or underfloor heating. |
| Pellet boiler | About €10,000 to €18,000 | Wood heating can be a good option, but it requires storage space and appropriate management. |
A heat pump can deliver about 3 to 4 kWh of heat for every 1 kWh of electricity under suitable conditions. This efficiency does not guarantee the same savings in every home: climate, the temperature you set, and correct sizing also matter.
Installation cost alone is not enough to compare options
An electric radiator costs little to install, but converts 1 kWh of electricity into about 1 kWh of heat. A heat pump requires a larger investment, but then uses heat from the air to produce more heat than the electricity it consumes.
Wood heating can also reduce costs in some cases. However, you need to allow for space to store pellets or logs, deliveries, and maintenance: affordable fuel does not eliminate these constraints.
Which heating system should you choose for your home?
Imagine two homes that need the same amount of heat. The first is well insulated and already has a water radiator system; the second is poorly insulated and heated with electric convectors. The same system won’t deliver the same results in both homes.
In the first home, an air-to-water heat pump can use the existing system. In the second, thermal insulation work may be a priority: otherwise, some of the heat produced will escape before it can benefit the occupants.
Three common situations
- House with a water-based central heating system: compare an air-to-water heat pump with the existing boiler, taking into account the temperature the radiators need.
- Apartment without a hydronic heating system: an air-to-air heat pump may be an option, subject to condominium rules and the layout of the rooms.
- Poorly insulated home: first assess heat loss and possible renovations, then compare systems suited to the remaining heating needs.
Eco-friendly heating is not just about the system: reducing heating needs, choosing an appropriate energy source, and controlling the temperature are also part of the equation. A well-adjusted thermostat and a reasonable temperature setting help save energy, but do not replace necessary renovation work.
Three steps to compare options and avoid miscalculations
- Define your actual needs. Note the floor area, insulation, region, heating habits, and whether the home has a water-based heating system. Knowing that a house is 100 m² is not enough to determine the right system.
- Compare complete quotes. Ask for the cost of the equipment and installation, any necessary modifications, maintenance, and estimated energy consumption. Also check which grants apply to your situation.
- Assess comfort and constraints. Consider noise, storage space, temperature controls, and ease of use. A solution that is theoretically economical must also suit the household’s everyday needs.
Above all, avoid comparing annual bills without checking the assumptions behind the calculations: weather, energy prices, indoor temperature, and the condition of the building can all vary. The most convincing figure is not always the most comparable one.
Questions to ask before signing
A condensing boiler may still be worth considering if you already have a gas connection, but its cost depends on energy prices and maintenance. A heat pump, on the other hand, requires a larger upfront investment and a thorough assessment to operate efficiently.
Ask the installer to explain the system sizing and the expected performance in your home. A clear estimate should specify the assumptions used, rather than promise a percentage of savings that applies to everyone.
Which heating system is often the cheapest to run?
A heat pump can be very energy-efficient if it is correctly sized and suited to the home. The result depends on insulation, climate, heat emitters, and the price of electricity.
Is a heat pump suitable for a poorly insulated house?
It can work, but heat loss may limit its efficiency and comfort. Have the insulation and heating needs assessed before choosing a system.
Is wood heating always cheaper?
Not necessarily. Fuel prices, system efficiency, storage, deliveries, and maintenance all affect the total cost.
Why can electric radiators be expensive to run?
They produce about 1 kWh of heat for every kWh of electricity consumed. In a poorly insulated home or one that is heated for long periods, the bill can rise quickly.
Thanks for reading! Feel free to share your thoughts in the comments. — Benjamin
