Air conditioning in French-speaking Switzerland: prices, types and 2026 rules

Switzerland long went without air conditioning: a temperate climate, well-insulated buildings, windows facing both north and south. That has changed. The heatwaves of 2018, 2022 and 2023 turned residential cooling from a luxury into something people actively want, especially around Lake Geneva. Here is the full guide to installing it in 2026 — prices, system types, Swiss regulation, and the cheaper alternatives.

Why cooling is booming in Romandie

Three factors converge in 2026:

• Rising summer temperatures: Geneva and Lausanne recorded more than 25 days above 30 °C in 2024, against 5 to 10 in the 1990s.
• Urban densification: heat islands (Geneva, Lausanne, Renens, Vevey) stay up to 5 °C warmer at night than peri-urban areas.
• Cultural shift: many Romands who have worked in southern Europe (France, Italy, Spain) now regard air conditioning as standard rather than a luxury.

The result: several installers around Lake Geneva report demand tripling in five years. Installation lead times in high season (May-July) often reach 6 to 10 weeks.

The types of air conditioning: pros and cons

1. Portable unit (no installation)

The most accessible option: a wheeled appliance with an exhaust hose run through a partly open window.

• Price: CHF 400–1'200 to buy
• Pros: no works, no authorisation, ideal in rented accommodation
• Cons: noisy (50–65 dB), inefficient (the open window cancels out part of the cooling), heavy electricity use
• Suits: tenants, small rooms (15–25 m²), occasional use

2. Split unit (1 indoor + 1 outdoor unit)

The classic: an indoor wall unit connected by refrigerant lines to an outdoor compressor on a balcony, wall or roof.

• Price: CHF 2'500–5'500 including installation
• Pros: effective, quiet indoors (20–30 dB), low consumption
• Cons: authorisation often required (see below), outdoor unit sometimes unpopular with neighbours
• Suits: owners of houses, or condominiums open to the idea, for 1 to 2 main rooms

3. Multi-split (1 outdoor unit + several indoor)

A single outdoor unit feeds 2 to 5 indoor splits, each room controlled independently.

• Price: CHF 6'000–15'000 depending on the number of splits
• Pros: only one outdoor unit (better looking, simpler to get approved), room-by-room control
• Cons: larger investment; if the compressor fails, everything fails
• Suits: houses or large flats of 100 m² and up

4. Reversible air-to-air heat pump

Technically identical to a split, but designed to heat in winter and cool in summer. Economically it is the smartest option: you replace or supplement your heating and gain cooling at the same time.

• Price: CHF 8'000–18'000 including installation, depending on floor area and number of units
• Pros: heating plus cooling, COP of 3 to 5 (very efficient)
• Cons: less powerful for heating than an air-to-water heat pump in a cold climate, and it requires a thermal study first. Generally not eligible for the Buildings Programme (Programme Bâtiments — measure M-05 targets air-to-water systems and M-06 ground-to-water and water-to-water systems, all hydronic, not air-to-air)
• Suits: owners doing an energy retrofit, or a new positive-energy build, who want summer and winter comfort and are not counting on Buildings Programme subsidies

5. Ducted air conditioning (centralised)

The most discreet and comfortable system: all the ductwork is built into suspended ceilings, with only small grilles visible.

• Price: CHF 15'000–35'000 including installation
• Pros: invisible, quiet, even cooling
• Cons: highly intrusive (suspended ceilings are unavoidable), expensive, realistic only for new builds or major renovations
• Suits: new houses or full renovations, with a substantial budget

Swiss regulation: what to know before installing

This is where Switzerland differs sharply from France or Italy: fitting fixed air conditioning is regulated and often requires authorisation. Three layers of rules stack up.

Layer 1: condominium rules (PPE) or your lease

• Tenants: any fixed installation (a split, an outdoor unit) needs the written agreement of the owner or the managing agent (régie). Most leases prohibit altering the façade.
• Condominium owners: because the outdoor unit is fixed to a common part (the façade), an assembly decision is generally required — often by qualified majority.
• The fallback: portable units and pedestal fans never require authorisation.

Layer 2: cantonal and municipal rules

In Geneva, installing air conditioning is governed at cantonal level by the Office des autorisations de construire (OAC), with precise energy criteria: proof of need, internal thermal loads, heat recovery, and a charge of CHF 10 per kW of cooling capacity. In the Canton of Vaud the procedure is usually municipal: since the 2023 RLATC revision, a simple notification to the municipality is enough in most cases (art. 68c RLATC). Outdoor units visible from public space do still require authorisation in protected areas or on listed buildings. Processing time: 2 to 8 weeks depending on the municipality.

For the wider picture on authorisations, see our guide to building permits in French-speaking Switzerland.

Layer 3: federal and cantonal regulation

• Noise (OPB): the federal Noise Abatement Ordinance sets strict limits for outdoor units, particularly at night. Modern models are rated 45–55 dB at 1 m, to be confirmed against the distance to your neighbours.
• Energy efficiency: installations must meet the MoPEC requirements (Modèle de prescriptions énergétiques des cantons — the cantonal model energy regulations). Note that room air conditioners were not covered by the 2021 label rescaling, which applied to fridges, dishwashers, washing machines and displays. They still use the seven-step A+++ to D scale under Regulation (EU) 626/2011, and are not due to be rescaled until around 2030 — so the class to aim for is never A or B. But read the letter carefully: that scale is two separate tables, and the classes do not mean the same thing across them. Fixed systems (split, multi-split, ducted) are rated on SEER/SCOP, and there you should aim for A+++ or A++. Portable single- and double-duct units are rated on a different EER/COP table with much lower thresholds, so their letter ranks them only against other portables: the Swiss Federal Office of Energy notes that a single- or double-duct unit rated A+ is less efficient in cooling than a class-D split. Never read a portable’s badge as equivalent to a fixed system’s.
• Refrigerants: fluids with a high global warming potential (R-410A, GWP 2088) will be progressively replaced from 2027 under the ORRChim / OFEV framework. Insist now on the newer low-GWP fluids (R-32, or better R-290 propane).

Subsidies: what exists, and what does not

• Cooling only: no subsidy. It counts as comfort, not as an energy improvement.
• Air-to-air heat pump (reversible cooling): as a rule not eligible for the Buildings Programme. Measures M-05 (air-to-water) and M-06 (ground-to-water / water-to-water) target hydronic systems, not reversible air conditioners. An air-to-water heat pump installed as part of replacing a fossil-fuel boiler does, by contrast, remain generously subsidised.
• Tax deduction: only where the installation replaces fossil-fuel heating (deductible as property maintenance or as an energy investment). Check with your fiduciaire (tax adviser).

Electricity use: the trap to avoid

A badly sized system, or one run at 18 °C, consumes an enormous amount. Some orders of magnitude for Romandie:

• Portable unit (10 h/day, July-August): CHF 80–200 of additional electricity
• Wall split (summer season, 25 m² room): CHF 60–150
• Multi-split house (3 units): CHF 200–500 per season
• Reversible heat pump: the summer cost is offset by the winter heating savings

Tip: setting 26 °C rather than 22 °C cuts consumption by 30 to 50%. The WHO recommends a maximum indoor/outdoor difference of 6 to 8 °C for comfort and health.

Passive alternatives worth considering first

Before investing CHF 5'000 in a split, consider these, which are often more effective and cheaper:

• External blinds or roller shutters: block up to 80% of solar heat gain — far more effective than internal blinds (CHF 800–3'000 per window).
• Solar window film: more discreet, CHF 50–150 per m² fitted.
• Automatic night ventilation: programmed window opening overnight (CHF 1'500–4'000 per installation).
• Ceiling fans: feels 4 °C cooler for CHF 200–600, with negligible consumption.
• Better roof insulation: if your top floor overheats, upgrading the insulation (wood fibre, rock wool) works better in the long run. See our thermal insulation page.

How to choose an installer in Romandie

Six things to check:

1. Commercial Register entry (zefix.ch), trading for at least 3 years for larger projects.
2. Refrigerant handling certification (category I under ORRChim, the Ordinance on the Reduction of Risks relating to Chemical Products). Mandatory for handling refrigerants.
3. Membership of suissetec (the building services federation) or the ASF (Association Suisse du Froid, the Swiss refrigeration association).
4. A thermal study before quoting — a good installer calculates solar gain and the building’s thermal mass and sizes the system precisely. Refuse a quote (devis) offered sight unseen.
5. An itemised quote giving the make, model, energy class and noise level of every unit.
6. An installation warranty of 2 to 5 years plus a manufacturer’s warranty of 5 to 10 years.

Which trade should you call?

In French-speaking Switzerland, installing modern air conditioning (a split, multi-split or reversible heat pump) is generally done by a chauffagiste — a heating engineer trained in refrigeration — rather than by an electrician alone, who would handle only the downstream electrical connection. A number of firms specialise in heating and cooling together.

On Artisan Romandie you can browse verified heating engineers in the region — many now install reversible heat pumps.