That means it can suck 11000 British Thermal Units of heat from the air per hour and discharge it outside, and is capable of cooling a space measuring 13-21m2. If you’re someone who suffers with hayfever, our collection of air purifiers will be perfect for sanitising your air quality. We turn the air cooler up to maximum for thirty minutes, and then an hour, to test how effective the airstream is at cooling people down, while also using a digital thermometer, or air quality sensor, to check whether it’s had any impact on the ambient room temperature or humidity. A remote control is always a handy feature to have, especially if you're using the unit in the bedroom and don't want to have to get out of bed to adjust settings or turn the unit off. Unlike one of the best fans, which work by circulating the air to create a breeze and cool a person, a portable air conditioner is a far more powerful affair that uses refrigerant and a compressor to actively lower the temperature in a room or even a whole living space.

Check that your preferred unit comes with built-in wheels to help you manouevre it within the home, but bear in mind that if you want to carry a unit up and down the stairs then you're probably going to need two people to do that safely. Especially if you're looking for ways to keep a bedroom cool as the fan's silent operation won't disturb your sleep. We haven't tested it thoroughly yet, but third party reviews mention it being basic – and noisy – but still doing the job of lowering the temperature when you're looking to beat the heat. Relatively affordable, lightweight and compact, energy efficient and easy to use, there's a lot to love about the MeacoCool MS Series portable air conditioners. It's generally recommended to close doors and windows in the room that you're trying to keep cool, so if you only want to keep a small bedroom cool then you can opt for a cheaper lower BTU unit, however an open plan space will require a much more powerful appliance with a larger BTU.As air coolers work by increasing the humidiity of the room, it's important to consider your climate and personal preferences when choosing the right air conditioning for you.

It has some downsides, but only in keeping with most portable air con units, in that it's heavy which makes it not quite as portable in reality as its name may suggest. After being massively impressed by the brand's virtually silent Duux Whisper Flex Ultimate Fan, we had high hopes this unit was going to be just as whisper-quiet, but sadly that also wasn't to be, with the North Smart proving just as loud as your average portable air con. Plus, its 780W power consumption is one of the lowest of all the air con units we've tested, meaning it offers lower running costs too. Because of this – and the fact that the water in the absorbent pad or membrane can grow stale – you need to keep the air cooler filled and change the water in the tank daily. Most will be around the 50dB mark, with some models offering quieter functionality of 40dB and others clocking in around 60dB.Check out our wider air conditioning unit range, we’ve got standing fans , desk fans , tower fans and USB fans . The inner vertical louvres oscillate left and right to give you a wider spread, and you can use the horizontal louvres to angle the airflow up or down. Air coolers use the simple and natural process of evaporating water to lower the temperature of the air.