Author: Neadoo

How Much Does Air Conditioning Cost in the UK? A Complete Guide to Installation and Running Costs

Posted on by Neadoo

As UK summers become progressively warmer, the thought of a cool, comfortable home is no longer a luxury but a growing necessity. The search for effective cooling solutions inevitably leads to one crucial question: how much does air conditioning cost? This comprehensive guide is designed to demystify the costs associated with getting air conditioning installed in your home. We will break down everything from the price of different air conditioning units to professional installation fees and the long-term running cost, providing you with all the information needed to make an informed decision and find the best option for your budget.

What Are the Main Types of Air Conditioning for a Home?

Before diving into the costs, it’s essential to understand the different types of air conditioning systems available for UK homes. The most common choice for domestic air conditioning is the split air conditioning system. This type consists of two main parts: an indoor unit that blows cool air into the room and an outdoor unit that dissipates the warm air extracted from inside. A multi-split system is a variation where a single, more powerful outdoor unit can connect to multiple indoor units, allowing you to cool several rooms independently. This is an excellent solution for cooling a whole house without requiring separate full systems for each space.

Another significant type is the ducted air conditioning system. This is a more integrated solution, often considered the premium choice for home air conditioning. The main unit is typically hidden in a loft or ceiling void, and the cool air is distributed throughout the home via a network of ducts to discreet vents in each room. While this offers a seamless aesthetic and whole-home cooling, the installation is more complex and thus more expensive. Both split and ducted systems can also function as a heat pump, providing efficient heating during the winter, making them a year-round climate control solution. Understanding these types of air conditioning is the first step in figuring out the potential cost for your property.

How Much Does a Basic Air Conditioning Unit Cost on Its Own?

The price of an air conditioning unit itself, separate from installation, can vary significantly depending on the type, brand, and capacity. For a single-room solution, a wall-mounted split air conditioner is the most popular choice. The cost for a good quality indoor unit and a corresponding outdoor unit from a reputable manufacturer like Daikin can start from around £600 and go up to £2,000 or more. The final price depends on the unit’s power (measured in BTUs or kW), its energy efficiency rating, and any additional features like Wi-Fi control or advanced air purification filters.

For a multi-split system, you’re looking at a higher initial cost for the more powerful outdoor unit, plus the cost of each individual indoor unit. An outdoor unit capable of supporting three or four indoor units might cost between £1,500 and £3,500, with each indoor unit adding an extra £200 to £600 to the total. A ducted ac system is the most expensive in terms of hardware, with the central unit and necessary ductwork often costing upwards of £4,000 before you even factor in the labour to install it. It’s clear that the hardware cost forms a substantial part of the overall air conditioning cost.

What’s the Average Cost to Install Air Conditioning in the UK?

So, how much does air conditioning cost when fully installed? The average cost to supply and install a single-room split air conditioning system in the UK typically ranges from £1,800 to £3,000. This price generally covers a standard wall-mounted ac unit, the corresponding outdoor unit, all necessary pipework and electrical connections, and the labour for a straightforward installation. A simple “back-to-back” installation, where the indoor unit is placed on the inside of the same wall as the outdoor unit, will be at the lower end of this scale.

For a multi-split system, the cost of installing the air conditioning will naturally be higher. A system with one outdoor unit and three indoor units could cost around £4,000 to £7,000, depending on the size and complexity of the installation. For a fully ducted air conditioning system, which provides the ultimate in discreet home cooling, the cost to install can range from £7,000 to £15,000 or more for an average-sized house. These figures for costs in the UK are estimates, and it’s always best to get a detailed quote from a qualified installer.

What Factors Influence the Final Air Conditioning Installation Cost?

The final installation cost for your air conditioning is not just about the unit itself. Several key factors can significantly influence the quote provided by an installer. The type and brand of the air conditioner you choose is the primary factor; premium brands like Daikin may have a higher initial hardware cost but often offer better performance and reliability. The number of rooms you wish to cool will also dictate whether you need a single split, multi-split, or ducted ac system, each with its own cost implications. The complexity of the installation plays a huge role; for example, the distance between the indoor and outdoor units affects the amount of copper piping and labour required.

Furthermore, the location of the unit within your property is a crucial consideration. Installing an outdoor unit on a flat roof or in a difficult-to-access area will increase labour costs compared to a simple ground-level placement. The building’s construction (e.g., solid brick walls vs. plasterboard) can also affect the time and effort needed. Lastly, where you are in the UK matters. Labour costs in major cities can be higher, so a London Air Conditioning Installation might have a different price point compared to one in a more rural area. For instance, getting Air Conditioning in Ealing will involve considerations specific to properties in that part of the city.

Are Portable Air Conditioning Units a Cheaper Option?

When homeowners first start looking into air conditioning, many are tempted by the low initial cost of a portable air conditioning unit. These freestanding units can be purchased for as little as £300 to £700 and require no professional installation. You simply plug them in and place an exhaust hose out of a window to vent the warm air. On the surface, this seems like a fantastic, budget-friendly way to get some much-needed cool air into your home.

However, the reality of a portable air conditioner often falls short. They are generally much less efficient than split systems, meaning your running cost will be significantly higher to achieve the same level of cooling. They are also notoriously noisy, which can be disruptive, especially in a bedroom or home office. Furthermore, the need for an open window to accommodate the exhaust hose is a security risk and allows warm air to re-enter the room, making the air con unit work even harder. While a portable air conditioning system offers an immediate and cheap solution for a single room, it is not a cost-effective or practical long-term strategy for home cooling.

How Much Does It Cost to Run Air Conditioning Per Hour?

One of the biggest concerns for anyone considering air conditioning is the running cost. How much will it add to your monthly energy bills? The cost to run an air conditioner is calculated based on its power consumption (in kilowatts, kW) and the price you pay for electricity (per kWh). As of 2025, the average cost of electricity in the UK is around 28p per kWh, but this can fluctuate. A modern, energy-efficient 2.5kW split air conditioning system, suitable for a medium-sized bedroom or living room, might consume around 0.7kW (700 watts) of power per hour when actively cooling.

Using these figures, the calculation for the cost of running an air conditioner is straightforward: 0.7 kW × £0.28/kWh = £0.196. This means it costs just under 20p per hour to run. A larger 5kW system for a bigger space might use around 1.5kW of power, costing approximately 42p per hour. It’s important to remember that the air conditioner will not be running at full power continuously. Once the room reaches the desired temperature, the system’s inverter technology will reduce power consumption significantly to maintain it, making the average hourly cost even lower. The air con will use much less energy to keep the room cool.

Will My Energy Bills Soar if I Run Air Conditioning?

The fear of sky-high electricity costs is a common deterrent for installing air conditioning in the UK. However, modern air conditioning systems are remarkably energy-efficient, especially when compared to older models or inefficient portable units. Is air conditioning expensive to run? It depends entirely on the system’s efficiency rating (look for high SEER ratings), how you use it, and how well your home is insulated. A well-installed air con system from a brand like Daikin in a well-insulated room will have to work much less hard to maintain a cool temperature.

Think of it in comparison to your central heating in winter. You use heating to make your home comfortable, and you accept the associated cost. Air conditioning is the same principle for summer. If you use it sensibly—for instance, setting it to a comfortable 22°C rather than an icy 18°C and only cooling the rooms you are using—the impact on your energy bills can be very manageable. Many modern systems with a heat pump are so efficient they can provide heating more cheaply than traditional gas boilers, potentially saving you money in the winter and offsetting some of the summer cooling cost. Ultimately, how much you run air conditioning determines its impact.

Why is Professional Installation So Important for Your Air Con?

While it might be tempting to cut costs by attempting a DIY air con installation or hiring a general handyman, this is a significant mistake. Professional installation is absolutely critical for the performance, efficiency, and longevity of your air conditioning system. Air conditioning units use refrigerant gases that are subject to strict environmental regulations (F-Gas regulations in the UK). Only certified engineers are legally allowed to handle these refrigerants and install, commission, and test the system to ensure it operates safely and without leaks.

An improperly installed air conditioner will not perform efficiently, leading to a much higher running cost and a shorter lifespan. Incorrect pipework, poor vacuuming of the lines, or an incorrect refrigerant charge will strain the compressor, the heart of the ac unit. A professional installation ensures that every component, from the indoor unit to the outdoor unit, is perfectly connected and calibrated for optimal performance. This guarantees you get the energy efficiency you paid for and helps to avoid costly repairs down the line. It’s a vital part of the overall cost of air conditioning.

How Do I Choose the Right Air Conditioning for My Home or Business?

Choosing the right air conditioning involves balancing your needs, budget, and property characteristics. For a single space like a living room or a new home office, a single split wall-mounted system is often the most cost-effective and efficient solution. If you’re looking to cool multiple rooms or an entire floor, a multi-split system with one outdoor unit connected to several indoor units offers great flexibility and is more aesthetically pleasing than multiple separate systems. For new builds or major renovations where you want a completely hidden solution, ducted air conditioning is the premium choice.

When selecting a unit, look beyond the initial purchase price. Consider the energy efficiency rating (SEER for cooling, SCOP for heating). A more efficient unit might have a higher upfront cost but will save you significant money on your running cost over its lifetime. It is highly recommended to speak with a qualified installer to discuss your requirements. They can perform a heat load calculation to determine the correct size of the air con unit needed for each room and discuss the best option to be installed in your home. Getting expert advice is the best way to make an informed decision on your home or business cooling.

Understanding the Costs: Is Air Conditioning a Worthwhile Investment for UK Homes?

After considering the unit price, the installation cost, and the ongoing running cost, is air conditioning a good investment? For an increasing number of people in the UK, the answer is a resounding yes. The benefits extend far beyond simply providing cool air. Modern air conditioning systems improve air quality by filtering out dust, pollen, and other allergens. The ability to get a comfortable night’s sleep during a heatwave has a direct impact on health and well-being. For those working from home, a cool and comfortable environment can significantly boost productivity.

The initial cost to install air conditioning can be seen as an investment in your property. As summers get hotter, air conditioning is becoming a more desirable feature for homebuyers, potentially adding value to your home. When you factor in that many systems also provide highly efficient heating, they become a year-round solution for home comfort. While the upfront air conditioning cost is a significant consideration, the long-term benefits of comfort, improved sleep, better air quality, and potential energy savings on heating make it a compelling and increasingly logical upgrade for modern UK homes. If you have more questions about what system might be right for you, you can often find answers on company websites; for example, you can See our FAQ.

Key Takeaways to Remember

  • Types of Systems: The main types are split, multi-split, and ducted air conditioning, each with different costs and applications.
  • Installation Costs: Expect to pay between £1,800 and £3,000 for a fully installed single-room split air conditioning system. Multi-room and ducted systems will cost more.
  • Influencing Factors: The final air conditioning installation cost will vary depending on the type of unit, property size, complexity of the job, and your location in the UK.
  • Running Costs: A modern, efficient air con can cost as little as 15-25p per hour to run, making it much more affordable than many people assume.
  • Avoid Portables: While cheap to buy, portable air conditioning units are noisy, inefficient, and have a high running cost compared to professionally installed systems.
  • Professional Installation is a Must: Always use a certified engineer to install air conditioning. This ensures safety, efficiency, and compliance with F-Gas regulations.
  • It’s an Investment: Air conditioning improves comfort, sleep, air quality, and can add value to your property, making it a worthwhile investment for many homeowners.

Victorian style

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Victorian architecture is one of the most recognisable elements of English culture. Since the 19 th century, it has become a staple of the UK cityscape. Over the years, many houses were designed with this style in mind, and many modern houses take inspiration from it. P & J Interiors can help you achieve that style in your own home with our amazing mouldings.

There are several architectural elements that all Victorian style houses have in common. When it was first introduced in the 1850s, the style revolutionised sanitation with toilet facilities and access to warm and cold water. This is also where lighting was introduced into the homes, which has allowed them to be modernised easily. Typically, Victorian houses contain basements for the storage of coal. Built from brick and stone, these houses were sturdy and usually constructed as detached houses, sometimes built on terraces. Sash windows are an essential part of the Victorian look, while roofs were finished with slate. No Victorian house could exist without a small garden. And of course, most importantly, cornices are used to not only cover any imperfections from the ceiling and wall, but also add more intricate ornamentation so characteristic of the style.

A beginner’s guide to fitting covings

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Though we always advise that you go the professional route and have your mouldings installed by a craftsman, there are means of installing covings on on your own. Consider the following tips, and you’ll know what to do to perform the installation as professionally as possible.

The first step: assembling the tools

When dealing with covings, the basic too you will need is a saw. Choose a solid, stiff saw that feels comfortable and secure in your hand. You will also need a mitre box that is big enough to fit the coving that will be cut. When preparing to make the cut, make sure that you’re propping the cornice against the back plate of the box. You will also need an adhesive in order to properly implement the coving. It is recommended that you utilise specialised coving adhesive, which usually comes in 25kg bags. The same adhesive will be used to finish all the joins and corners as well. It is very important to check if your room temperature isn’t below 10 degrees – if it is, the adhesive will lose its properties and won’t bond the materials correctly. Other tools you’ll need include: a pencil, ruler, hammer, nails, sanding sponge, water, filling tool, as well as a paintbrush. Fantastic Section of Building / Fitting guides you’ll find here.

Step two: cutting

After gathering all the tools, it is time to cut the coving. Use firm strokes with your saw – don’t go too quickly or too forcefully, as you might damage the cornice or injure yourself. Grip the coving with your non-cutting hand to make sure it doesn’t slip or otherwise move in the mitre box. Do try to make sure that the coving is always level so you don’t make any sloping cuts.

Step three: fitting

Always start the fitting from the first corner you can see as you enter the room. If the walls in your room have any outward corners, such as a fireplace, you should start the fitting there instead. Make sure the area of the wall where the coving will be fixed is clean before you start the fitting process. Next, draw a line at the height you want the coving to be around the entire room. You might be tempted to measure it with reference to the ceiling, but the ceiling may not be level, so use a spirit level to make sure your line is parallel to the ground. Use pin nails around every 500 mm to create temporary supporting guides – any holes left behind will later be filled up with the adhesive. Make measurements along the wall and then transfer them to your coving, optionally marking the line in the direction you will be making the cut. Cut the coving and check if the two covings meet in a satisfying way – don’t worry about keeping a perfect 90 degree angle.

Apply the coving adhesive to the entire length of the back edges of the plaster in the areas where it will meet the wall and ceiling. Add more adhesive to areas where it will meet the other piece to ensure a strong adhesive effect and prevent cracks from appearing in the future. Make sure to clean up any excess adhesive – you can use it to fill the gaps between joins as well as between the coving and ceiling. Leave it to dry and later come back to remove the nails, filling up the holes with the rest of the adhesive.

The final step

After 24 hours have passed, you can proceed to paint your coving. Though there are many types of paint that will provide a satisfying effect, water-based emulsion is the most reliable way to paint on plaster mouldings and ceilings.

Explaining the difference between coving and cornice

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Introducing a moulding into your home can provide you with countless benefits. You can greatly enhance the aesthetic quality of the room, as well as provide a number of practical advantages. Before deciding to implement one, however, there is a choice to be made: should you choose a coving, or a cornice? Keep reading to find out.

In simple terms, cornices are ornate, covings are simple. This works as a general rule of thumb, but it is important to note that this rule has its exceptions, so decorative cornices can still be relatively simple. It’s in the detail that the true distinction can be made.

Covings form a steady line along the ceiling with the profile being a very traditional quarter-circle (or “C” shape). Standard covings can come in various sizes, with the most common one being 127 mm (or 5 inches). However, this number does not refer to the height or projection of the coving. Instead, it denotes the imaginary diagonal line from the wall to the ceiling that will be filled by the coving. While covings are mostly simple in design, there are many stylistic options to choose from, so make sure you pick one that suits your needs the best.

Cornices, on the other hand, can be incredibly intricate and complex in many respects. From varying degrees of depth to intricately ornamental carvings, cornices require a lot more thought and effort to be crafted and implemented properly. However, if you manage to choose the ideal design for a specific type of interior, you can greatly enhance the look of your home, leaving a lasting impression on visitors.

So which should I choose?

While it all comes down to personal preference, the fact that cornices are more visually striking comes at the consequence of them being hard to implement. Only a master craftsman can truly ensure that your cornice won’t end up a disaster. Covings, on the other hand, are much simpler to implement, and therefore cheaper, which is why they were an incredibly popular choice in the post-world war period. In the end, it’s entirely up to you – whether you want to spend more on a more elaborate product or spend less on something more simple, there really is no wrong way of going about it.

A handy guide to cornices

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When talking about architecture, especially that of the classical and neoclassical movement, cornices are a term that is often brought up. The word itself comes from the Italian term denoting a “ledge”. In English, the word has come to be used purely in the context of architecture, describing a horizontal moulding that can be found at the top of a building or piece of furniture.

How do internal and external cornices differ?

In the context of buildings, when we talk about cornices we mean either the ledge near the top of the building exterior that is usually decorative in some way, or the interior plaster mouldings decorating the walls just below the ceilings in many homes. While the external cornice can serve an important practical purpose as it protects the walls from excessive rain water, interior cornices have a purely aesthetic purpose.

A brief history of cornices

Cornices have been present in our interiors for centuries. They have been decorating walls and pillars ever since the Georgian period. While they started off as pretty simple, they later evolved into various directions. During the Regency period, cornices became more ornamented, while the Victoria period saw a return to older styles like Gothic and Neo-Baroque. The Edwardian period, on the other hand, came back to a more simple approach, utilising minimal ornamentation and clean lines.

Historically, external cornices served an incredibly important purpose by diverting rainwater from the walls. Nowadays, considering architects employ gutters and other, more effective means of doing that, such as eaves and gutters, their purpose is purely aesthetic, much like that of the interior cornice that comes in a myriad of shapes and styles.

Cornice styles through the ages

Throughout the years, the use of the interior cornice has changed in ways both subtle and profound. At the beginning, from as early as the Georgian period, any rooms in the building that had the purpose of receiving and entertaining guests had cornices that were much more decorative and robust, while those used in private chambers were more bare-bones. These designs were heavily inspired by the Classical period, as well as the English Baroque. The most popular design from that period was the egg and dart – a simple design that nonetheless adds an air of sophistication to any interior. The Georgian period also gave us simpler cornices with sheer horizontal lines – a pattern that is universal and ubiquitous, perfectly complimenting even contemporary homes. The Regency period introduced cornices with more intricate designs, such as leaf patterns, while the Victorian era added a whole plethora of diverse designs inspired by the Gothic and other periods that can still be used to great effect today.

Fibrous plaster and you – implementing cornices into your home in the most practical way

Many people still value the aesthetic qualities of cornices and want to have them implemented into their homes. This is, of course, a perfectly valid choice, and we now have the means of creating the most reliable cornices in history. With fibrous plaster, creating strong, eye-catching cornices is easier than ever. It is still only easy by architectural standards, meaning you’ll get your cornice done quickly and professionally – but only if you trust professionals to do it. Do not attempt to install a fibrous plaster cornice in your home by yourself, as it requires years of professional experience to be applied well.

Why plaster

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A building material used in architecture for centuries, plaster remains a popular material for interiors to this day. It can serve both a protective and decorative purpose, most often used for mouldings nowadays. Manufactured from dry powder and water, then applied to the desired surface, plaster is easy to apply and mould into any shape you may desire.

The great advantage plaster has over many other decorative materials is the fact that it can be easily worked with any tool. Even sandpaper is enough to achieve the desired shape. At P & J Interiors, we use various metal tools to achieve the fine details that our mouldings are known for. It is also possible to create the decorations in advance and later attach them to the plaster with an adhesive. However, it is important to remember that while plaster is a versatile decorative material that can be moulded to fit any taste, it is not a strong material that can really only be reliably used fir finishing, rather than load bearing.