Buying a second-hand air conditioner in Europe: what the price tag hides

Updated September 8, 2026 · Claude AC · 3 sources cited

Contents (7)

First question: what is inside it?
Moving a split is three jobs, not one
The arithmetic that decides it
The checks to run before money changes hands
When second-hand genuinely makes sense
Paperwork, warranty and the rules that do not apply
Frequently asked questions

The listings are everywhere: a four-year-old split, house move, two hundred euros, collection only. Against the installed price of a new system it looks like an obvious saving, and occasionally it is. But an air conditioner is not a fridge you carry home and plug in. The machine is one line of the bill, and two of the remaining lines are governed by European refrigerant law rather than by the seller — which is why a used split that costs a fifth of a new one can still end up costing three quarters as much on the wall.

First question: what is inside it?

The nameplate on the outdoor unit states the refrigerant and the factory charge. Read it before discussing price, because the answer can end the conversation.

Refrigerant	Typical vintage in Europe	What it means for a used machine
R-22	Equipment sold up to the mid-2000s	Walk away. This ozone-depleting HCFC has been banned for servicing across the EU since 1 January 2015, virgin and reclaimed alike, so the first leak is the end of the machine.
R-410A	Roughly 2005 to the early 2020s	Legal to run and to service, but caught in the F-gas quota phase-down: supply shrinks year by year, the price of a recharge climbs, and the unit is a generation behind on efficiency.
R-32	Most European splits since about 2018	The current mainstream and the sensible second-hand target. Mildly flammable (A2L), widely stocked, familiar to every installer.
R-290 (propane)	Recent monoblocs and some heat pumps	Highly flammable, with charge limits and siting rules that make casual relocation specialist work rather than a weekend job.

The direction of travel matters as much as today’s legality: the bans and quota steps that shape resale value over the next decade are set out in our guide to the 2024 F-gas Regulation, and the propane question in our guide to R-290 air conditioners in Europe.

Moving a split is three jobs, not one

Relocating a wall split involves work most private sellers underestimate:

Pump-down and removal. The charge is recovered into the outdoor unit — or into a recovery cylinder — before anything is disconnected. Venting refrigerant to atmosphere is an offence throughout the EU.
Reinstallation. New flared connections, brackets, electrical supply, and ideally a new line set: reusing copper that has been cut, kinked or left open to the air is how moisture and debris enter a circuit that will not tolerate either.
Vacuum, leak test and charge adjustment. The circuit is evacuated to remove moisture, pressure-tested, then topped up by weight for the new pipe length. All of this is refrigerant-handling work, and under EU rules it may only be performed by certified personnel — refrigerant itself may only be sold to certified undertakings.

The practical consequence is blunt. If the previous owner had a handy friend unbolt the pipes and let the gas escape, you are buying a machine that needs a full recharge from a professional who did not do the removal and cannot warrant what happened to it. Our guide to whether an air conditioner really needs regassing explains why a healthy sealed system never needs gas in the first place — and why a used one that does is telling you something.

The arithmetic that decides it

Set the equipment price aside and count the whole job. Reinstalling a second-hand split takes an installer roughly as long as installing a new one — the same brackets, core drill, pipework, vacuum and commissioning — so the labour line barely moves. The indicative national ranges are in our guide to air conditioning installation costs in Europe. What the used route saves is the equipment; what it adds is de-installation, a probable line set, and a real chance of a recharge. Then there is the running cost.

An honest efficiency comparison, using round numbers: a 2.5 kW room worked for 500 hours in a season needs 1 250 kWh of cooling. An older fixed-speed or early inverter machine at SEER 4 draws about 310 kWh to deliver it; a current inverter at SEER 7 draws about 180 kWh. The 130 kWh difference is worth roughly 20 to 45 € a year at European retail prices of 0.15–0.35 € per kWh — perhaps 200 to 450 € across a decade, before counting the lower reliability of a machine already halfway through its life. In a heavily used living room that gap swallows the saving; in a spare room cooled ten days a year it never materialises. How to read the efficiency figure is in our guide to the EU energy label.

The checks to run before money changes hands

See it running. Twenty minutes in cooling mode at the seller’s home, before anything is dismantled. Expect air leaving the indoor unit 8–12 °C below the air entering it, no frost on the pipework, and no rattle or growl from the outdoor fan.
Photograph both nameplates. Indoor and outdoor models must be a factory-matched pair; mismatched halves are unsupported and often uncommissionable. Note capacity in kW, refrigerant, charge weight and year of manufacture.
Inspect the outdoor unit closely. Flattened fins, rust at the chassis feet and salt-etched coils tell you where it lived; coastal machines age fast.
Ask who is removing it, and for their F-gas certificate. A seller who has already had the pipes cut has halved the value of what they are selling.
Smell the indoor unit. A musty return means a neglected drain tray and blower — recoverable, but a reliable sign of how the machine was kept.
Count the years left. European splits typically give twelve to fifteen years in domestic service; the repair-or-replace test is in our guide to air conditioner lifespan in Europe.

When second-hand genuinely makes sense

Portables and window units. Sealed, self-contained, no refrigerant work, no installer: plug it in and judge it in five minutes. This is the honest used purchase in Europe, and the reason the second-hand portable market dwarfs the second-hand split market. Venting one properly is another matter — see our guide to venting a portable through a European window and our portable air conditioner pages.
Low-value, low-hours rooms. A workshop, a garage, a holiday flat used three weeks a year: the efficiency penalty is theoretical when the machine barely runs.
A system that comes with the building. Inheriting an installed, working, R-32 or R-410A split with the house is not the same transaction at all — nothing is moved, nothing is opened, and the only sensible spend is a service.
Ex-display or B-stock from a dealer. New equipment at a discount, with a warranty and an invoice. Almost always a better deal than a private used unit at a similar price.

Paperwork, warranty and the rules that do not apply

Manufacturer warranties in Europe generally require installation by a qualified professional and often registration by the first owner; they rarely survive a private resale, and no installer will warrant equipment they did not supply. They will warrant their own work, which is worth having in writing. One rule that does not apply to most households is worth stating plainly, because it is often quoted at buyers: mandatory leak checks and equipment logbooks start at 5 tonnes of CO₂ equivalent, and a domestic split holding around a kilogram of R-32 (GWP roughly 675) sits well below that threshold. That is a commercial obligation, not a household one. What does apply to everyone is the certification requirement for whoever touches the circuit — verify it as described in our guide to choosing an air conditioning installer, and note that only the installation itself, not the age of the machine, is what a national energy performance certificate tends to record.

Frequently asked questions

Can I move a split air conditioner myself if I am careful?

No, not legally, and rarely well. Recovering, handling and charging refrigerant requires an F-gas certificate in every EU member state, and the refrigerant cannot be sold to you without one. The technical trap is separate from the legal one: an open circuit absorbs moisture within minutes, and moisture in a system is what destroys compressors months later. Our guide to what DIY air conditioning the rules allow sets out the line between what you may do and what a professional must.

Is a used R-410A machine a bad buy?

Not automatically. It is legal to own, run and service, and plenty of good equipment holds it. The risk is asymmetric: if it never leaks, you are fine, and if it does, you are buying an increasingly scarce refrigerant for a machine already behind on efficiency. Price the unit as if a recharge were probable rather than impossible, and the decision usually makes itself.

What is a fair price for a second-hand split?

Think in terms of the installed total rather than the sticker. A used unit is worth buying when the equipment price plus removal, pipework and commissioning lands well below a new installation of the same capacity — and it stops being worth it the moment a recharge or a new line set is added. Ask an installer for a reinstallation quote before agreeing to buy, not after.

How can I tell how old an air conditioner is?

The nameplate normally carries a manufacturing date or a serial number encoding one; most manufacturers publish the format. Cross-check it against physical clues — the refrigerant type brackets the era on its own, and an R-22 nameplate dates a machine to the mid-2000s or earlier whatever the seller believes.

Do I still need an installer if the unit is already dismantled?

Yes, and the job is now harder. An open, empty system needs pressure-testing, a deep vacuum and a full weighed charge, and any installer will price that accordingly — assuming they accept the work at all, since they cannot know how the circuit was treated. A machine offered as already removed should be valued far below one still running on a wall.