When to buy an air conditioner for less: a month-by-month guide

The best time to buy an air conditioner is off-season, from autumn to late spring, with two highlights: Black Friday (late November) and the January sales. The worst time is during a heatwave: demand soars within days, popular models sell out and installers get booked up. If you're thinking of cooling your home next summer, now is the time to watch prices, not July.

Best month to buy an air conditioner: the calendar

This table sums up the usual patterns for air conditioning in France and much of Europe. Treat it as qualitative guidance, not a promise: each year's weather has a big effect on prices and stock.

Month	Rating	Why
January	Good	Winter sales in the depths of low season: last summer's end-of-line models.
February – March	Good	Low demand; installers usually have more availability.
April – May	Average	New ranges arrive; a good time to get a split system fitted before summer.
June	Watch closely	Early hot spells can make demand jump overnight.
July – August	Avoid	Heat peaks, stock shortages, longer installation lead times, little room to compare.
September	Average	End of season: some clearance, mainly on portable units.
October	Good	Low season; ideal for choosing a model and noting its price.
November	Good	Black Friday: offers on out-of-season products, to be checked one by one.
December	Average	Low demand, but year-end deals focus on other departments.

For other home appliances, see when to buy home appliances, and for how price cycles work in general, the best time to buy.

Why air conditioners cost more in a heatwave

People rarely buy air conditioning "cold". Most decide when the heat becomes unbearable, and everyone decides at the same time. Stocks of portable units melt away, the models still available are rarely discounted and express delivery fees pile on. For a split system the problem is even sharper: installers are in high demand and lead times stretch, sometimes to the end of summer.

Buying in low season means calmer prices, a full range to choose from and an installer with time to do a proper job. Black Friday falls on Friday 27 November 2026 (see our Black Friday 2026 guide) and the French winter sales 2027 run from 6 January to 2 February 2027, except in a few départements (see winter sales 2027).

Portable or split air conditioner: which should you choose?

Type	Installation	Strengths	Limits
Portable (single unit)	None: plug it in, with an exhaust hose out of a window	Lower purchase price, movable, no building work	Noisy (compressor in the room), less efficient, window gap to seal
Fixed through-wall unit (no outdoor unit)	Holes drilled in the wall, usually no refrigerant handling	Discreet outside, no outdoor unit	Building work, often limited power, noise in the room
Split (single or multi-split)	By a professional certified for refrigerants	Quiet indoors, efficient, often reversible (heating)	Installation cost, outdoor unit, possible paperwork

To cool a bedroom a few weeks a year, a portable unit may be enough. For regular use or several rooms, a split system is usually more comfortable and more efficient.

Installing a split system: what the rules say

Split air conditioners contain fluorinated refrigerants, greenhouse gases regulated by EU Regulation (EU) 2024/573 and, in France, by the Environmental Code (articles R543-75 onwards). In practice:

• any work that opens the refrigerant circuit (vacuuming, charging, leak testing) must be done by a company holding a certificate of capacity ("attestation de capacité"), using a technician with a certificate of competence;
• non-hermetically sealed equipment charged with fluorinated gases may only be sold to an end user where there is evidence that installation will be carried out by a certified company;
• portable single-unit air conditioners, delivered sealed and ready to plug in, don't need an installer.

Ask the installer for their certificate before signing the quote. One more thing to check in France: a visible outdoor unit that changes the look of the building may require a prior declaration to the town hall (article R421-17 of the Planning Code) and, in a co-owned building, approval from the owners' general meeting. Think about noise for the neighbours too. Rules differ in other countries, so check locally.

How to read an air conditioner's energy label

Unlike dishwashers or fridges, the EU energy label for air conditioners still uses the old A+++ to D scale (Delegated Regulation (EU) 626/2011). A revision is under way at EU level, but until it applies, go by the label shown on the product.

• SEER: seasonal efficiency in cooling mode. Higher is better.
• SCOP: seasonal efficiency in heating mode, for reversible models.
• Indicative annual consumption in kWh and capacity in kW.
• Noise level of the indoor and outdoor units.

Note that single-duct portable units are officially called "local air conditioners" and can't be compared directly with a split system. For sizing, don't rely on a single rule of thumb: the right capacity depends on the room's volume, insulation and exposure. A good installer works this out before recommending a model.

The true cost of an air conditioner

The sticker price is only part of the bill:

• Portable: the unit, a window sealing kit if needed, electricity.
• Split: equipment, installation (drilling, pipework, commissioning), any electrical work, regular professional maintenance, electricity.

For running costs, think kWh per year × your price per kWh, adjusted to your real use. In France, public renovation grants change often and depend on the project, so check the official France Rénov' website before signing. The two-year legal guarantee of conformity covers the appliance, and French retailers must take back your old appliance for free when you buy an equivalent new one.

Air conditioner buying checklist

1. Define your use: one room or several, a few days or all summer, cooling only or reversible.
2. Choose between portable, through-wall and split based on your home and budget.
3. For a split: check the paperwork (town hall, co-owners) and get several quotes from certified companies.
4. Compare SEER, SCOP, capacity and noise level.
5. Shortlist the exact model in autumn and note its price.
6. Aim for Black Friday, the January sales or early spring.
7. Avoid buying during a heatwave.
8. Be wary of crossed-out prices: see how to spot a fake discount.

Put it into practice: buy your air conditioner off-season

The hardest part is thinking about air conditioning when it's cold. UniverTrack remembers for you: it checks the price regularly, builds a dated history and alerts you at the right moment. It's most useful for a portable or through-wall unit bought online; for a split system fitted by an installer, the price is mainly negotiated through quotes.

1. Paste the link of the air conditioner you want into UniverTrack (Amazon, Cdiscount or another retailer site, on a best-effort basis): you get a free preview with its current price.
2. Set a target price in autumn, for example below the lowest price seen in recent weeks.
3. Get an email when that price is reached, and buy before the first heatwave. Our price drop alert guide explains the settings.

For a single air conditioner, the Découverte plan is enough (up to 10 products, price history and alerts). If you're comparing the same model across several retailers, the Pro plan groups the links you add on one product page and shows the best offer. Compare them on the pricing page, then start the 14-day free trial, with no commitment.