Choosing · Read 7 min
Air-to-air heat pump vs reversible AC: the difference
By the Aircadia team
A reversible air conditioner and an air-to-air heat pump are exactly the same appliance. The words “heat pump” emphasise heating, “reversible AC” emphasises cooling. Sellers keep the confusion alive, but the difference between a heat pump and a reversible AC does not exist: the only real choice is between an air-to-air heat pump (blows warm or cool air into the rooms) and an air-to-water heat pump (heats water in the radiators, no cooling function).
Key points
- “Reversible AC” and “air-to-air heat pump” refer to the same equipment — the France Rénov’ heat pump page states it explicitly.
- The real question is: air-to-air or air-to-water? Two very different systems in terms of works, price, aid and use.
- Since 18 July 2026, a “high-performance” air-to-air heat pump qualifies for the 5.5% VAT rate (order of 13 July 2026), instead of 10% — a major change for install pricing.
- MaPrimeRénov’ no longer funds air-to-air heat pumps as a single work since 2025: only within a major renovation package (accompanied pathway, min. 2 DPE classes gained).
- The CEE bonus remains open to air-to-air units, with no income cap, provided the pump is ≤ 12 kW and has a SCOP ≥ 3.9.
What’s the difference between an air-to-air heat pump and a reversible AC?
None. Both terms describe the same equipment: an outdoor unit that extracts calories from the outside air, a refrigerant circuit, and one or more indoor units that blow air. It is reversible: heat in winter, cool air in summer.
The France Rénov’ page states it plainly: “the air-to-air heat pump extracts energy from the outside air, heats it and transfers it directly into the room to be heated.” The vocabulary shifts because the context does: an installer selling summer comfort talks about “reversible AC”, a retrofitter selling winter heating talks about “air-to-air PAC”. It’s the same device on the quote.
So what’s the real choice: air-to-air or air-to-water?
That’s where the decision is made — the two systems have nothing in common.
| Criterion | Air-to-air PAC (reversible AC) | Air-to-water PAC |
|---|---|---|
| What flows indoors | Air blown by the indoor units | Hot water in radiators or underfloor heating |
| Cooling function | Yes (reversible) | No (except rare models) |
| Works involved | Wall drilling, indoor units | Full replacement of heating loop, hot-water tank |
| Installed price (Côte d’Azur, 2026) | €1,500 to €6,500 (mono to multi-split) | €10,000 to €18,000 |
| Fit for Mediterranean climate | Excellent (mild winters, strong cooling demand) | Good, but heating only |
| Domestic hot water | No | Yes (with tank) |
| MaPrimeRénov’ single-work | Excluded since 2025 | Eligible (up to €5,000 by income) |
| CEE bonus | Yes, no income cap | Yes, higher amounts |
| VAT | 5.5% since 18/07/2026 (if high-performance) | 5.5% |
On the Côte d’Azur, with long summers and mild winters, an air-to-air heat pump covers both needs (heating + cooling) for 3 to 4 times less than an air-to-water pump. It’s the majority choice in Nice, Cannes or Antibes. Air-to-water keeps its appeal when the home already has underfloor heating, or when replacing an old oil/gas boiler without touching the existing radiators.
What do COP and SCOP mean on a quote?
Two numbers that appear everywhere, often confused:
- COP (Coefficient of Performance): efficiency measured in the lab at an outdoor temperature of +7 °C. A COP of 4.0 means the unit produces 4 kWh of heat per 1 kWh of electricity. This is the “showroom” figure.
- SCOP (Seasonal Coefficient of Performance): average efficiency over an entire heating season, computed at several temperatures (+12, +7, +2, -7 °C). Much closer to real-world efficiency.
On a quote, SCOP is the only relevant figure. It’s also what regulation requires: SCOP ≥ 3.9 to unlock the CEE bonus on an air-to-air pump, per the standardised operation sheets of the scheme. Modern A+++ models rate 4.3 to 4.8. On the Riviera coast, the pump operates within its ideal range almost year-round, so the real SCOP stays close to the catalogue figure — far more than in Lille or Strasbourg.
What are the 2026 financial aids for an air-to-air heat pump?
Here is the exact state of the scheme in summer 2026, sourced from service-public.gouv.fr and Légifrance:
| Aid | Air-to-air eligible? | Amount / rate |
|---|---|---|
| MaPrimeRénov’ single work | No (excluded since 01/2025) | — |
| MaPrimeRénov’ accompanied path | Yes, if +2 DPE classes minimum | Variable by income |
| CEE bonus (BAR-TH-129) | Yes, no income cap | €300 to €1,500 |
| Reduced VAT 5.5% | Yes, since 18/07/2026 | On equipment + labour |
| Energy voucher (chèque énergie) | Yes, as a top-up | €48 to €277 |
| Zero-interest eco-loan (Éco-PTZ) | Yes, if work package | Up to €30,000 |
The switch to 5.5% VAT is a major shift: on a multi-split at €4,500 excl. tax, the VAT saving (5.5% instead of 10%) is roughly €200 off the bill. The full 2026 grants breakdown is in our dedicated guide.
Air-to-air heat pump: what technical conditions in 2026?
To qualify for 5.5% VAT and the CEE bonus, the air-to-air pump must meet several cumulative criteria, defined in the order of 13 July 2026 and article 278-0 bis A of the French Tax Code:
- Building completed more than 2 years ago, residential use.
- Nominal power ≤ 12 kW per outdoor unit.
- SCOP ≥ 3.9 (Seasonal Coefficient of Performance, heating).
- Refrigerant compliant with the F-Gas Regulation in force at the quote date (typically R32 or R290 — see our R32 / R410A comparison).
- Digitally controllable equipment (smart thermostat, time slots).
- Install by a certified fluoro-refrigerant technician (mandatory to handle refrigerants) and RGE QualiPAC-certified to unlock the CEE bonus.
Often missed: RGE is not required to install — it is required to unlock the aids. A non-RGE installer can legally fit your reversible AC, you simply won’t get the CEE bonus.
For a home on the Côte d’Azur, what’s the practical answer?
Three typical profiles observed around Nice and the 06:
- 40-80 m² apartment in Nice, Cannes, Antibes: air-to-air multi-split, €3,500 to €5,500 incl. tax, 5.5% VAT, CEE bonus €500-800. Payback 6-8 years vs. electric heating + portable AC.
- Villa with existing electric heating: air-to-air ducted or multi-split, €6,000 to €12,000 incl. tax. Reversible AC remains the best compromise on the Riviera coast.
- Older home with radiators and an old oil/gas boiler: air-to-water is more relevant if the goal is to keep the radiators. MaPrimeRénov’ then offsets the price gap. See also the older-home retrofit guide.
FAQ — Air-to-air heat pumps and reversible AC
Is a reversible AC really a heat pump?
Yes, without ambiguity. A reversible AC is an air-to-air heat pump: same equipment, same thermodynamic principle (refrigerant compression-expansion cycle). The vocabulary shifts depending on whether the sales pitch emphasises heating or cooling. The official France Rénov’ page confirms this in plain terms.
Should I choose an air-to-air or an air-to-water heat pump?
It depends on three things: whether you already have a hydronic heating loop (radiators or underfloor heating → air-to-water makes more sense), whether you need summer cooling (→ air-to-air is mandatory), and your budget (air-to-air is 3 to 4 times cheaper installed). On the Riviera, with strong cooling demand and mild winters, air-to-air covers both needs at a fraction of the cost.
Is a reversible AC eligible for MaPrimeRénov’ in 2026?
No, not as a single work. Since January 2025, the air-to-air heat pump (i.e. the reversible AC) has been excluded from “MaPrimeRénov’ par geste”. It remains eligible under the accompanied path, i.e. a major renovation gaining at least 2 DPE energy classes. For a straight replacement, look to the CEE bonus (€300 to €1,500, no income cap) and the 5.5% VAT since July 2026.
What SCOP should I aim for on a high-performance air-to-air pump?
The regulatory threshold to unlock aids is SCOP ≥ 3.9. Decent market models rate between 4.0 and 4.5; modern A+++ units reach 4.6 to 4.8. On the Côte d’Azur, with rarely-negative winter temperatures, the real SCOP stays close to the catalogue figure — far less true in Lyon or Strasbourg, where sub-zero drops widen the gap.
Sources and references
- France Rénov’ — The heat pump: official definition of the PAC types (air-to-air, air-to-water, geothermal).
- Order of 13 July 2026 (JORFTEXT000054436382): eligibility rules of air-to-air pumps for 5.5% VAT.
- Article 278-0 bis A of the French Tax Code: legal framework of the reduced VAT rate on energy renovation.
- Service-public.gouv.fr — VAT rates for renovation works: practical sheet updated 21 February 2026.
Want clarity on your project?
Aircadia operates in Nice, Cannes, Antibes and across the 06. We quote every project with the right technology: reversible AC when that’s the right call, air-to-water when it truly fits. Free, clear quote within 48 hours, with 5.5% VAT and CEE bonus eligibility checked: request yours online.