Comparing heating systems based solely on their purchase cost skews the calculation. The true indicator is the total cost over ten to fifteen years, which includes the initial investment, annual consumption, maintenance, and available subsidies. Since September 1, 2026, the rules of MaPrimeRénov’ have significantly changed the situation: some previously subsidized equipment is no longer funded, altering the financial equation for economical heating in your home.
Total cost by heating system: what the ten-year comparison reveals
The price per kilowatt-hour is not enough. A cheap-to-purchase system can end up costing much more than an expensive system with low annual consumption. The table below summarizes the major trends observed for a properly insulated single-family home.
| System | Initial Investment | Annual Operating Cost | Maintenance | MaPrimeRénov’ Eligibility (since Sept. 2026) |
|---|---|---|---|---|
| Air/water heat pump | High | Low | Moderate (annual contract) | Yes (guided and gesture-based pathway) |
| Geothermal heat pump | Very high | Very low | Moderate | Yes |
| Biomass boiler (wood, pellets) | High | Low | Moderate to high (flue cleaning, storage) | No (gesture-based pathway removed) |
| High-efficiency gas boiler | Moderate | Variable (gas price) | Moderate | No (fossil fuel excluded from guided pathway) |
| Electric inertia radiators | Low | High | Almost none | No |
The air/water heat pump offers the best balance between low operating costs and access to public subsidies. The biomass boiler remains inexpensive to use, but the loss of subsidy since September 2026 increases its actual entry cost.
To delve deeper into the parameters influencing this grid, a dedicated guide on economic heating details the often underestimated expense items during sizing.
MaPrimeRénov’ since September 2026: equipment losing funding
The decree n° 2026-822 of August 25, 2026 has refocused MaPrimeRénov’ on decarbonized systems. Since September 1, 2026, the gesture-based pathway no longer funds individual wood or biomass equipment, thermodynamic water heaters, or solar thermal equipment.
The guided pathway (major renovation) goes further. For single-family homes, projects submitted since this date must not install or retain fossil heating, including gas or oil. Hybrid heat pumps with fossil backup are also excluded.
This change has a direct consequence on the choice of a system. A homeowner who submits their application after September 1, 2026, and wishes to benefit from the guided pathway will only have access to a limited number of solutions:
- Air/water or geothermal heat pump, which remain eligible for both pathways of MaPrimeRénov’
- Connection to a district heating network, relevant in serviced urban areas
- Combined solar systems as part of a bundle of work (excluding gesture-based pathway)
The submission date of the application determines the applicable regime, not the date of the quote or the start of the work. A file submitted at the end of August 2026 remains subject to the old rules, even if the installation takes place in 2027.
Housing insulation and efficiency: the two variables that change the bill
No efficient system can compensate for poor insulation. Heating is the primary energy expense for a household, and this share significantly increases in a poorly insulated home.
Before replacing a boiler, measuring thermal losses guides the budget. Strengthening the insulation of attics or exterior walls reduces the heating power requirement, allowing for the sizing of a smaller and less expensive system.
COP and efficiency: understanding actual performance
The coefficient of performance (COP) of a heat pump indicates how many kilowatt-hours of heat it produces for one kilowatt-hour of electricity consumed. A COP of 3 means that the heat pump delivers three times more energy than it consumes.
However, this COP is measured under standardized conditions. In extreme cold, it drops. For a house located in a harsh climate zone, a geothermal heat pump maintains a stable COP throughout the year due to the constant ground temperature, while an air/water heat pump sees its performance decrease below zero degrees.
For wood, the efficiency of a pellet stove far exceeds that of a traditional log insert. Automatic fuel supply regulation limits losses. An old log stove can operate at a much lower efficiency than a device labeled Flamme Verte.
RE2020 in new construction: carbon constraints and heating choices
In new construction, the environmental regulation RE2020 imposes strict carbon emission thresholds that effectively exclude any system relying solely on gas.
Construction carbon thresholds evolve in successive stages, pushing builders towards very low footprint solutions from the design phase.
In practice, new homes are massively leaning towards heat pumps (air/water or geothermal), sometimes coupled with solar thermal backup.
Timeline of aids and application strategy
The tightening of MaPrimeRénov’ transforms the administrative timeline into a financial lever. Two homeowners installing the same equipment a few weeks apart can receive very different amounts of aid depending on their submission date.
- Check the eligibility of the targeted equipment at the time of submission, not at the time of the first quote
- Anticipate regulatory changes: thresholds and eligible equipment are regularly revised by decree
- Combine heating replacement with insulation work to access the guided pathway, which has higher aid ceilings
The choice of an efficient heating system relies on three measurable data points: the total cost over the equipment’s lifespan, the level of insulation of the home, and the applicable aid regime at the time of application submission. Since September 2026, only heat pumps and network connections retain full access to public funding.
