Retailers have watched their stock disappear from shelves
Britain's homes, built for centuries to hold warmth against grey skies, now face a new adversary: the heat they were never designed to escape. As summers grow longer and hotter, ordinary households are confronting a question once reserved for offices and hotels — how to cool a space not built for cooling. The answer, it turns out, is neither simple nor cheap, and the choice each household makes will reflect not just their budget, but the nature of their home, their tenure, and their tolerance for disruption.
- Retailers are watching air conditioning units vanish from shelves and online inventories empty, signalling a demand the UK market was not fully prepared to meet.
- The tension is sharpest for renters and listed-building residents, who are locked out of permanent solutions and left with portable units that cost more to run over time.
- Split systems offer a meaningful middle ground — more efficient, more effective — but their £2,000–£3,500 installation cost puts them beyond easy reach for many households.
- Ducted whole-home systems promise the most comfort but can demand £10,000 or more in installation, making retrofitting an older British home a project that borders on impractical.
- Reversible heat pumps are quietly emerging as a dual-purpose alternative, capable of heating in winter and cooling in summer — a longer-term answer to a climate that is shifting in both directions.
Britain's summers are growing hotter, and households are responding in ways the country's housing stock was never designed to accommodate. Homes built to trap warmth are now being asked to shed it, and the market for air conditioning — long confined to cars, hotels, and offices — has arrived at the front door.
There are three routes available, each demanding a different trade-off. Portable units are the most accessible: no installation, no tradesperson, no planning permission required. They cost between £350 and £650, and some retailers have dropped prices further to clear stock. For renters or those in listed buildings where structural changes are forbidden, they are often the only viable option. The catch is efficiency — expect to add 25 to 40 pence per hour to your electricity bill.
Split systems occupy the middle ground. An indoor unit and an outdoor condenser are connected by a pipe, expelling heat outside while cooling a room within. The equipment costs £750 to £1,100 per unit, but full installation typically runs £2,000 to £3,500 — and adding a second room can push that to £6,000. They run more cheaply and cool more effectively than portable units, but they require professional installation and a meaningful upfront commitment.
Ducted systems are the most comprehensive solution, routing cooled air through every room via a network of pipes and vents. They are also the most expensive and most disruptive, with installation costs ranging from £5,000 to £10,000. For older homes, the work involved in retrofitting can make the project impractical altogether.
For those who cannot or will not invest in air conditioning, older remedies still hold: cross-ventilation overnight, blinds drawn during the heat of the day, fans to keep air moving, and adequate hydration. Reversible heat pumps — air-to-air models designed to both heat and cool — offer a longer-term alternative as the UK's climate continues to shift. The question is no longer whether cooling is necessary, but which version of it fits your home, your means, and your circumstances.
Britain's summers are getting hotter, and homeowners are responding by turning to air conditioning in numbers not seen before. Retailers have watched their stock disappear from shelves. Online inventories have emptied. The technology that has long been standard in cars, hotels, and office buildings is now becoming a question for ordinary households—ones that were built, after all, to trap warmth, not shed it.
There are three main paths to cooling a home, each with its own calculus of cost and disruption. Portable units are the entry point: standalone machines that plug into any socket and draw warm air in, cool it, and push the heat back outside through a window duct. They run between £350 and £650 depending on the brand, though some retailers have dropped prices as low as £149 to move stock. They require no installation, no tradesperson, no planning permission. For renters or anyone living in a listed building where structural changes are forbidden, they are often the only option. The trade-off is efficiency: a portable unit will add roughly 25 to 40 pence per hour to your electricity bill.
Split systems are the middle ground. These consist of two units—one mounted inside, one outside—connected by a pipe. The outdoor unit acts as a condenser, expelling unwanted heat into the air. You can install one for a single room or link multiple indoor units to a single outdoor condenser. British Gas identifies these ductless systems as among the most common choice for UK homes. The equipment itself costs between £750 and £1,100 per unit, but that is only the beginning. Full installation, including the work to connect it to your home's electrical system, typically runs £2,000 to £3,500. Add a second room and costs can climb to £6,000. Split systems cool more effectively than portable units and run more cheaply, but they demand professional installation and a larger upfront commitment.
Ducted air conditioning is the comprehensive solution: a central unit that pushes cooled air through a network of pipes and vents in every room. It is also the most expensive and most disruptive. The equipment alone costs between £990 and £1,750. Installation—finding space for the ducting, routing it through walls, managing the complexity of older homes—typically ranges from £5,000 to £10,000 depending on the property's size and layout. For anyone retrofitting an existing house, the work can be substantial enough to make the whole project impractical.
The size of both split and ducted systems is measured in BTUs—British Thermal Units—a figure that determines how much cooling power you need for a given space. Larger BTUs mean larger rooms and higher costs. Electricity prices, which remain significantly elevated compared to a few years ago, mean that running any air conditioning system will increase your overall energy bill. Some environmental groups have raised concerns about the chemicals used in cooling units and their broader impact on the environment.
Planning permission is not required for portable units. For split and ducted systems, the government says permission is generally not needed "in most cases" for small homes if the installation would not materially change the building's external appearance—but there is no blanket rule. Homeowners are advised to check with their local authority, which should apply common sense to the decision.
For those who cannot afford or do not want air conditioning, there are alternatives. Opening windows on opposite sides of the house encourages cross-ventilation, but only when the outside air is cooler than inside—typically overnight or early morning. During the heat of the day, keeping windows closed and blinds drawn helps. Fans are cheap and energy-efficient ways to keep air moving. The NHS recommends six to eight glasses of water daily, though hot weather demands more. Loose-fitting clothes and tepid showers can help lower body temperature.
Some heat pumps can also function as air conditioning systems if they are reversible models. Air-to-air heat pumps are specifically designed to both heat homes in winter and cool them in summer by reversing the direction in which they transfer heat. As the UK's climate shifts and heatwaves become more frequent, the question is no longer whether air conditioning is necessary—it is which version makes sense for your home, your budget, and your circumstances.
Citas Notables
Portable or window units are a good short-term solution and are also ideal for renters or those who live in listed buildings who cannot make major changes to their property— Checkatrade
Air-to-air heat pumps are specifically designed to provide both heating and cooling by reversing the way they transfer heat— Which?
La Conversación del Hearth Otra perspectiva de la historia
Why is air conditioning suddenly becoming such a big deal in Britain? Homes have managed without it for centuries.
The summers are genuinely getting hotter now, and heatwaves are more regular. People can't sleep, can't work comfortably. It's not about luxury anymore—it's about livability during extreme heat.
So everyone should just buy one?
Not necessarily. A portable unit is £350 to £650 and needs no installation, but it costs 25 to 40 pence an hour to run. A split system is quieter and more efficient but costs £2,000 to £3,500 installed. A whole-house ducted system can hit £10,000. It depends entirely on what you can afford and what your home allows.
What about renters or people in old buildings?
They're often stuck with portable units. You can't modify a listed building, and you can't install permanent systems in a rental. Portables are the only realistic option, even if they're less efficient.
Is there any environmental cost to all this?
Yes. The chemicals in cooling units have environmental impacts, and running air conditioning increases electricity consumption. That's a real tension—you're trying to stay comfortable while potentially increasing your carbon footprint.
So what do people do if they can't afford it?
Open windows at night when it's cooler, keep them closed during the day, use fans, stay hydrated. It's not comfortable during a real heatwave, but it's what many people will have to do.