Updated: 8th July, 2025
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Portable air conditioners are movable units designed to cool specific areas. They are especially useful in spaces where traditional air conditioners are impractical or unavailable.
Struggling to keep cool during a UK heatwave? Portable air conditioners have become a popular option, letting people control the temperature in different rooms without permanent installation. A portable air conditioner is a compact unit designed to cool your space quickly and can be moved easily from one room to another.
These air conditioners are especially useful in homes where traditional units are impractical or impossible to install. They come in various sizes and offer features like dehumidifying, sleep modes, and smart controls to suit different needs and room sizes. Choosing the right model, understanding energy ratings, and using simple maintenance tips can make a real difference in comfort and running costs.
When choosing a portable air conditioner for UK homes in 2025, key factors include cooling power, noise level, energy efficiency, and value for money. Models like the MeacoCool, De’Longhi, Russell Hobbs, ElectriQ, and Inventor cover a range of features and budgets to help users stay cool without permanent installation.
Below is a quick comparison of the main features for each model:
Model | BTU | Room Size | Noise Level | Energy Rating | Additional Features |
|---|---|---|---|---|---|
MeacoCool MC Series Pro 9000 | 9,000 | up to 26 m² | ~53 dB | A | Timer, remote, swing |
De’Longhi Pinguino PAC EL112 | 11,000 | up to 30 m² | ~50 dB | A+ | Eco mode, real feel tech |
Russell Hobbs 2-In-1 RHPAC11001 | 11,000 | up to 25 m² | ~54 dB | A | Dehumidifier, easy-move |
ElectriQ Eco Silent 12000 | 12,000 | up to 32 m² | ~48 dB | A | Ultra-quiet, wifi/app |
Inventor Chilly 9000 BTU | 9,000 | up to 20 m² | ~52 dB | A | Compact, affordable |
The MeacoCool MC Series Pro 9000 is perfect for medium rooms up to 26 m², delivering a solid 9,000 BTU of cooling without being too noisy. It usually retails for around £400.
Noise: Around 53 dB, quiet enough for TV or sleep
Extras: 24-hour timer, remote control and easy-fit window kit
Portability: Smooth castors and compact size for effortless moving
Energy: A-rated efficiency helps keep your electricity bill in check
Users say it feels noticeably cooler within minutes and love how fuss-free the setup is. Overall, it’s an excellent all-rounder if you need reliable, no-frills cooling.
With 11,000 BTU, the De’Longhi Pinguino PAC EL112 can chill rooms up to 30 m² while operating at a whisper-quiet 50 dB. You’ll find it online for about £650.
Comfort tech: Real Feel adjusts temperature and humidity automatically
Maintenance: Washable filter plus castors for effortless positioning
Energy: A+ rating with an eco mode to reduce running costs
Extras: Remote control and built-in timer for hands-free operation
Owners praise its rapid cooling and the fresher air feel thanks to humidity control. It’s a top pick for anyone who wants smart, efficient cooling in larger spaces.
This 11,000 BTU model doubles as a heater, dehumidifier and fan, suited to rooms up to 25 m², and costs around £320 on average.
Controls: Clear display, 24-hour timer and automatic swing mode
Noise: Approximately 54 dB—standard for its power bracket
Versatility: Four-in-one functionality for year-round use
Portability: Built-in handles and castors for easy relocation
It’s a solid choice if you want multiple features without breaking the bank, offering great value for money.
The ElectriQ Eco Silent 12000 pairs 12,000 BTU of cooling with an ultra-quiet 48 dB output for rooms up to 32 m², priced at about £350.
Smart features: Wi-Fi control, plus eco and night modes
Fit: Universal window kit works with most UK window types
Energy: A-rated efficiency keeps your running costs low
Design: Sleek digital display with touch controls
Users love its silent operation and how quickly it brings down room temperature. If noise is your main concern, this model ticks that box without sacrificing power.
Ideal for small spaces up to 20 m², the Inventor Chilly 9000 BTU unit costs roughly £200 and is great for bedrooms or home offices.
Portability: Lightweight design with easy-roll castors
Modes: Cool, dehumidify and fan-only settings
Noise: Moderate 52 dB, suitable for most living spaces
Simplicity: Intuitive controls and handy remote included
It’s a straightforward, budget-friendly option if you need basic cooling without extras, making it perfect for first-time buyers.
Selecting the right portable air conditioner starts with measuring the room where it will be used. Most manufacturers recommend matching the air conditioner's cooling capacity, measured in British Thermal Units (BTUs), to the size of the room in square metres.
Example Room Size vs. BTU Table:
Room Size (m²) | Recommended BTU |
|---|---|
Up to 15 | 7,000 - 8,000 |
15 - 25 | 9,000 - 10,000 |
25 - 35 | 12,000 - 13,000 |
35+ | 14,000+ |
A unit with too low a BTU rating will not cool the room well. One with too high a BTU rating can cool too quickly without removing enough humidity, leading to discomfort.
Consider energy efficiency as well. Look for models with a good energy rating, which helps reduce electricity costs over time.
Noise level matters, especially for bedrooms or home offices. Many units list their decibel levels; quieter units provide a better environment for sleep or work.
Other features may be important, such as a programmable timer, remote control, or multiple fan speeds. Some units also include dehumidifiers or air purifiers, which can be useful in certain climates.
Make sure the unit will fit in the chosen space and can be easily moved if needed. Easy-to-clean filters and simple maintenance can help prolong the life of the air conditioner.
Choosing between a portable air conditioner and a wall-mounted unit depends on individual needs, space, and budget. Each type has strengths and weaknesses.
Portable Air Conditioners
Easy to set up: No professional installation is needed.
Flexible: Can be moved from room to room.
Suitable for renters: No permanent changes to property.
Usually lower upfront cost but can be less efficient at cooling large spaces.
Can be noisy and may require venting through a window.
Wall-Mounted Air Conditioners
Fixed in place: Installed by a qualified professional, such as an F-gas engineer.
More efficient: Cools larger or multiple rooms more effectively.
Quieter operation and better energy ratings.
Higher initial cost with extra installation charges.
Not ideal for renters due to the need for building changes.
Feature | Portable Aircon | Wall-Mounted Aircon |
|---|---|---|
Installation | No professional needed | Must be installed by engineer |
Cost | Lower upfront | Higher upfront |
Mobility | Move room to room | Fixed in place |
Efficiency | Less efficient | More efficient |
Best For | Renters, small rooms | Homeowners, larger areas |
Noise Level | Can be noisy | Quieter |
Some may prefer the flexibility of a portable air conditioner, especially in flats or when moving frequently. Others may need the power and discreet look of a wall-mounted system, particularly in larger homes. Choosing the right type depends on the user’s living situation, budget, and comfort needs.
Keeping a portable air conditioner in good shape does not take much time, but regular care is important. Simple steps help the unit run better and last longer.
Clean the filter every two weeks. Dust and dirt build-up can block airflow, making the unit less effective. To clean, remove the filter, rinse it with warm water, and let it dry fully before putting it back.
Wipe down the outer casing with a soft cloth. Avoid using harsh chemicals as these may damage the surface. Keeping the outside clean also helps stop dust from getting inside.
Check and clean the air vents often. Use a vacuum or a small brush to remove dust from the vents. This can help improve cool air flow.
If the unit uses a drain pan or water tank, empty and clean it regularly. Mould can grow quickly if water is left to sit. Wipe the tank with a mild soap and water solution.
Inspect the coils once a month. Dirty coils make the air conditioner work harder. Use a soft brush or cloth to gently clean the coils.
If the portable AC contains R290 refrigerant, make sure there are no leaks or strange odours. R290 is safe when the unit is intact but always follow safety tips from the manual.
Table: Quick Checklist
Task | How Often |
|---|---|
Clean or replace air filter | Every 2 weeks |
Wipe outer casing | Weekly |
Clean air vents | Monthly |
Empty & clean water tank | Weekly |
Check coils | Monthly |
Inspect for R290 leaks | As needed |
Store the unit in a dry place when not in use. Always unplug before any cleaning.
Choosing the correct BTU rating is crucial for effective cooling. Both the air conditioner's dehumidifying ability and the vent hose set-up have a significant impact on performance and comfort.
The BTU rating, short for British Thermal Unit, measures an air conditioner's cooling power. But cooling isn’t the only important job—removing excess moisture (dehumidifying) is also key, especially in humid climates. Too much humidity can make a room feel warmer and less comfortable, even if the air is cool.
Portable units list their dehumidifying capacity, often in litres per hour. A stronger BTU rating usually removes more moisture as it cools. For rooms with high humidity, a higher BTU-rated portable air conditioner can help keep the air drier and more comfortable. However, buying a unit with excessive BTU for a small space might cause the machine to short cycle, not running long enough to dehumidify properly.
When choosing, check both the BTU rating and the dehumidifying specification. Proper dehumidifying lets the air conditioner cool the room faster and prevents mould or damp build-up.
A tight, straight exhaust hose is essential for full cooling power. Installing it correctly stops hot air leaking back in and lets your unit reach its full BTU rating.
Follow these steps:
Attach the hose securely to both the aircon outlet and your window kit
Run the hose as straight as possible, avoiding sharp bends or loops
Seal gaps around the window kit with foam or tape to block any leaks
Keep the hose length to a minimum; longer hoses reduce efficiency
Even a good aircon can get noisy if it isn’t set up right. Placing the unit on a perfectly level surface stops extra vibrations, while a quick weekly filter clean prevents the fan from working harder than it needs to. Using the quiet or sleep mode at night and checking for loose panels or screws to tighten will also help keep the sound down.
An A-rated or better aircon uses noticeably less electricity for the same cooling job, so you save on bills over the summer. Check the yellow Energy Guide label for EER or CEER—higher figures mean the unit squeezes more cooling from every kilowatt.
Even if a top-rated model costs more up front, the reduced running costs usually pay back the difference quickly.
Smart portable aircons with Wi-Fi, app control and programmable timers let you pre-cool from your phone or set custom schedules, ideal if you like automation. By contrast, basic models rely on manual dials or a simple remote, so there’s no setup fuss and nothing to go wrong if your home Wi-Fi drops offline. Choose the style that fits your lifestyle and comfort with technology.
At 27p per kWh, a 1.2 kW portable aircon uses about 32p an hour, or roughly £2.50 for an eight-hour day. A similar split system draws just 0.6 kW, costing about 16p an hour, or £1.30 for the same run time. Split systems need a professional install but typically save more on energy over the long term.
Type | Typical Power Use | Hourly Cost (UK) |
|---|---|---|
Portable AC | 1–1.3 kW | £0.27–£0.35 |
Split System (mini-split) | 0.5–0.8 kW | £0.14–£0.22 |
Using your aircon smartly can shave pounds off your energy bills without sacrificing comfort.
Try these tips:
Position the unit close to your window with the shortest possible hose run
Close curtains or blinds during peak sun hours to reduce heat gain
Clean or replace the filter every few weeks to maintain optimal airflow
Use a fan alongside the aircon so you can set the thermostat a couple of degrees higher
Seal drafts and close doors to unused rooms so cool air stays where you need it
If you don’t have a standard window, you can use a sliding door, drop-ceiling panel or spare dryer vent for the exhaust hose. Cut a hole to fit the hose and seal around it with tape or foam to stop warm air leaking back in. Never vent into an attic, crawl space or another closed area, as the hot air must go outside.
A portable air conditioner pulls warm room air over chilled coils, then blows the cooled air back into the space. At the same time it gathers moisture and forces the warm, damp air out through an exhaust hose. That hose must be vented to a suitable outside outlet.
The best model depends on your room size, budget and noise preference. Match the unit’s BTU rating to your room’s square metres and look for an A-rated energy label to keep running costs down. If you plan to use it in a bedroom or study, choose one with noise below 55 dB.
Measure your room and compare it to the manufacturer’s recommended coverage area before choosing a model. Check for easy-clean filters and caster wheels so you can move it between rooms with ease. Features such as timers or a remote control can add extra convenience.
For rooms up to 20 m², a single-hose unit with 7,000–9,000 BTU will usually suffice. If you need to cool larger areas or want faster results, opt for a dual-hose system with 10,000 BTU or more. Prioritise models with sleep modes, automatic shut-off and quiet operation for the best experience.
Standard portable units are too bulky and require an exhaust hose, so they are not practical for cars. Instead, look at 12 V coolers or small evaporative fans designed for vehicles, which offer mild cooling. For real chill on the road, your car’s built-in air conditioning remains the most effective choice.
A portable aircon uses a closed-loop refrigeration cycle to move heat from inside to outside via chilled coils and an exhaust hose. Warm air passes over the cold coils before returning to the room cooler. To keep it running smoothly, regularly clean the filter and empty the water tank or choose a self-evaporating model.
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