Gas vs heat pump, south of France | Riviera Home Experts

Your gas boiler is getting old, or it has just died. On the Côte d'Azur you have three options: fit another gas boiler, switch to a heat pump, or run a heat pump alongside the boiler. The answer depends on your house, how long you plan to keep it, and how you weigh the price today against the bills later.

How does a heat pump differ from a gas boiler?

A gas boiler burns gas and turns roughly 85 to 95% of it into heat. A heat pump burns nothing. It uses electricity to move warmth from the outside air into the house. On the Côte d'Azur a modern unit gives 3 to 4 kWh of heat in winter for every kWh of electricity it uses. Installers call that ratio the COP.

That gap in efficiency drives the whole comparison. Whether it shows up on your bills depends on what French electricity and gas cost at the time.

Which costs less to run: gas or heat pump?

In France a kWh of electricity costs more than a kWh of gas. A heat pump needs far fewer kWh to make the same heat, though. So on running costs the heat pump usually comes out ahead.

On the coast it usually wins by a wide margin. Winters are mild enough that the COP rarely drops below 3, even on the coldest nights. Ask the installer for a running-cost comparison for your own house, using today's electricity and gas prices.

Heating engineer inspecting a gas boiler during a routine maintenance visit

What drives the installation price of a gas boiler or a heat pump?

A new condensing gas boiler is usually the cheaper option upfront. The price rises if it can't go where the old one was, or if the flue needs a new lining.

A heat pump has more variables. Can your radiators and pipework be reused, or are they too small for the lower water temperature? Where can the outdoor unit go without bothering neighbours, and does a copropriété (the building's co-ownership) or the ABF (the heritage architect in a protected centre) need to approve it? Does your electricity contract need more power? A poorly insulated house also needs a bigger unit. For air-to-air splits, each indoor unit and pipe run adds to the price.

Get at least two written quotes, and ideally one for each option on the same house. Our heat pump costs guide goes into more detail.

Which grants and TVA rates apply to a gas boiler or a heat pump?

French grants exist to move homes off fossil fuels, so a new gas boiler gets almost nothing. Since 1 March 2025 it's taxed at 20% TVA (French VAT), and replacing gas with gas earns no CEE (energy-supplier grants) credits. Servicing or repairing the boiler you already have stays at 10%.

What a heat pump gets depends on its type:

Air-to-water, in your principal residence: MaPrimeRénov' (the state renovation grant) if the installer is RGE-certified (carries the state's approved-installer label), plus CEE credits and 5.5% TVA. Replacing a gas boiler can also bring the Coup de pouce Chauffage bonus (a bigger CEE bonus for replacing a fossil-fuel boiler), which multiplies the CEE.
Air-to-water, in a second home: MaPrimeRénov' and the Coup de pouce are both principal-residence only. You keep the standard CEE and the 5.5% TVA rate.
Air-to-air split: Standalone air-air units are excluded from MaPrimeRénov'. The coast sits in the lowest CEE climate band, so the CEE bonus is small and varies by supplier. The 5.5% TVA rate applies since 18 July 2026 only if the unit meets an efficiency spec, so ask the installer to confirm the model does.

So grants close the price gap for an air-to-water system in a main home. For an air-air split in a holiday home they barely move it. Ask which TVA rate is on the devis, and see current MaPrimeRénov' amounts at france-renov.gouv.fr.

What is the carbon impact on the French electricity grid?

France makes around 70% of its electricity in nuclear plants, which emit very little carbon per kWh. The grid is much cleaner than Germany's or the UK's.

A heat pump on French electricity has a far lower carbon footprint than a gas boiler making the same heat.

Why does summer cooling tip the Côte d'Azur comparison toward heat pumps?

A reversible air-to-air heat pump heats in winter and cools in summer from the same units. A gas boiler only heats, and in July and August most Riviera homes need cooling.

Keep gas and you'll probably add split AC anyway. That's a second installation, a second set of equipment and a second service contract. So the fair comparison is gas plus AC against one reversible system. One catch: an air-to-water heat pump feeding radiators heats only. If you want cooling as well, ask the installer how the quote handles it.

When does a new gas boiler still make sense in southern France?

Replacing a gas boiler with a new one is still legal in an existing home. Oil is different: a new oil boiler has been banned since July 2022, even as a like-for-like replacement, except in rare cases.

Gas can be the practical choice in three situations. The first is an emergency. If the boiler fails in January, a new gas boiler goes in faster than a heat pump, which needs a survey, a design and often a wait for equipment.

The second is a short hold. Say the house is a holiday let you plan to sell in two to three years, and the gas supply is in good order. A full heat pump installation may not pay back in that time.

The third is radiators. Radiators sized for a hot gas boiler may be too small for the lower water temperature a heat pump runs at. Replacing them, or adding underfloor heating, adds cost and disruption. Before assuming a simple swap, ask the installer to check whether your radiators will work with a heat pump.

Gas boiler or heat pump: which is right for a Côte d'Azur home?

For a planned upgrade, most Riviera homeowners are better off with a heat pump. The mild winters keep it efficient, the same units cool in summer, and the French grid makes the carbon case easy. Grants help most with an air-to-water system in a principal residence.

In an emergency, or in a house where a heat pump would be costly to fit, a new condensing gas boiler is a reasonable stopgap. You can add a heat pump later, either as the main system or alongside the boiler as a hybrid. A hybrid is taxed at 20% TVA like the boiler, and MaPrimeRénov' dropped hybrids in September 2026.

Gas heating vs heat pump in the south of France