10 Best Portable Air Conditioner 2025 in the UK

The Pro Breeze 4-in-1 Portable Air Conditioner offers solid cooling power with 9000 BTU, making it suitable for medium to large rooms like living rooms, bedrooms, or offices. It can cool spaces down to 16°C effectively. This model is energy efficient, carrying a Class A rating and using an eco-friendly R290 refrigerant, which helps keep running costs and environmental impact lower than many alternatives. Noise-wise, it produces about 54 dB, which is moderate—noticeable but not overly disruptive for most users.

Portability is decent: it weighs 24.5 kg and includes wheels, allowing you to move it around within your home without too much effort. It also comes with window venting kits for both sliding and hinged windows, which helps with proper exhaust and prevents hot air from coming back in. One of the standout features is its smart home compatibility—via WiFi, you can control the unit using a smartphone app or voice commands through Alexa or Google Home, adding convenience.

The 4-in-1 functionality means it’s more than just a cooler; it can dehumidify, work as a fan, and has a sleep mode for quieter, gentler operation at night. While the size is reasonable for portability, it’s still somewhat bulky compared to smaller units, and at 24.5 kg, moving it up and down stairs could be challenging. The noise level, though acceptable, may be noticeable in very quiet rooms or for light sleepers. The energy efficiency ratio (SEER 2.6) is decent but not the highest available, so if you want the best energy savings, there are more efficient units out there. This air conditioner is well suited for those needing flexible cooling with smart controls and energy-conscious operation in medium-sized spaces, especially users who appreciate tech features and easy installation but can handle a slightly heavier unit.

The LEENON 9000 BTU portable air conditioner is a solid choice for cooling small to medium rooms up to around 370 sq.ft., such as bedrooms or home offices. It offers a good cooling capacity with an energy-efficient compressor rated at 9000 BTU and an A rating for energy efficiency, helping keep electricity use reasonable. The unit includes 3-in-1 functionality—cooling, fan, and dehumidifier modes—which adds versatility for different weather conditions. Its noise level is about 65 dB, which is average for portable ACs; it won’t be silent but should be manageable in most rooms.

Portability is well addressed with caster wheels and handles, making it easy to move between spaces. Installation is straightforward thanks to the included window exhaust kit that fits standard sliding or hung windows, which helps with venting hot air outside. The 24-hour timer and remote control add convenience, and the sleep mode helps reduce noise and energy use at night.

The unit weighs 25 kg, which is on the heavier side, so lifting it might require some effort despite the wheels. The noise level might be noticeable in very quiet settings, and while the dehumidifier works, the humidity level cannot be adjusted manually. Also, regular cleaning of the air filter is needed to keep performance optimal. This air conditioner fits well if you need a straightforward, portable cooling solution with decent energy efficiency and multiple modes for a small to medium room. It is practical for home or office use, especially if you want an all-in-one device that also removes humidity and circulates air.

The Dreo Smart 3-in-1 Portable Air Conditioner offers a strong cooling capacity of 12,000 BTU, suitable for medium-sized rooms up to about 14 feet in distance, making it a good choice for bedrooms or small offices. It stands out with a relatively quiet operation at 46 dB, thanks to its noise isolation system around the compressor, so it won't be disruptive while sleeping or working. The unit is moderately sized and weighs around 28.5 kg (62.9 pounds), which means it’s portable but may require some effort to move around. A helpful feature is its drainage-free design under 85% humidity, reducing the usual hassle of emptying water tanks, which is convenient for continuous cooling. It also includes a dehumidifier and fan mode, giving you flexible control over your comfort.

The Dreo AC can be controlled remotely via a smartphone app or voice commands through Alexa and Google Home, adding modern convenience. Installation is made easier with universal window kits that fit most window sizes, which is a plus if you want a straightforward setup. On the downside, the unit’s wattage is 3500 watts and runs on 220 volts, which might mean higher electricity costs compared to less powerful models. Also, at nearly 30 kg, it might not be ideal if you need very frequent mobility or a compact design. If you live in a very humid climate with humidity above 85%, you may still need some manual drainage.

This Dreo portable AC is well-suited for those wanting effective, quiet cooling with smart controls and minimal maintenance, especially in modestly sized rooms. Users should consider its size, power consumption, and potential limitations in very humid environments when making a decision.