Pro Breeze 4-in-1 Portable Air Conditioner 9000 BTU – Smart Home WiFi Compatible - 24 Hour Timer & Window Venting Kit Included. Powerful Air Conditioning Unit with Class A Energy Efficiency Rating

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In our tests, similar to the MeacoCool MC Series 7000BTU Portable Air Conditioner and AEG Comfort, it managed to cool a 4.5m2 room by 2°C in 10 minutes, and despite the manufacturer stating its noise level is 65dB, our reviewer found it much quieter than the Meaco model, comparing it to the AEG Comfort on this front. 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.

It also comes with a remote control and two window kits included, a timer function, 'night' mode for (slightly) quieter night-time operation, plus 3-in-1 air con, fan and dehumidifier functionality. 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. Portability A powerful portable air conditioner that looks good, is easy to use, is relatively quiet in comparison to most, has WiFi connectivity, and – most importantly – can cool down a room fast, as long as you don't mind its slightly higher running costs. The unit performed solidly during our testing, reducing the temperature in the room by 2°C in 10 minutes. Like most air con units it isn't silent, there's 51-53dB of noise depending on if you opt for the low or high cooling setting, but it's a downside our testers were happy to accept in return for its temperature-reducing powers.

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Very often an air con unit will come with additional functionality, usually a fan setting and dehumidifier function. More expensive portable air conditioners sometimes also feature a heater function that means you're more likely to be able to get year-round use out of your investment. Personally, we'd sacrifice some chill (and save a lot of cash) and opt for the Duux Whisper Flex Ultimate Fan over the North Smart every time. Especially if you're looking for ways to keep a bedroom cool as the fan's silent operation won't disturb your sleep. Whilst the fan won't actively lower the room temperature like the North Smart can, all those who've tested the Duux Whisper Fan now swear by it's oh-so-silent 'natural-feeling' breeze, reaching for it as a go-to sleep aid whenever the mercury soars. Similarly, investing in a unit with a timer function gives you the ability to programme the unit to turn off a few hours after you've got into bed, or to turn on during the hottest part of the day to keep the house cool for pets, or reduce the temperature before you get home from work. A unit with Smart functionality can also offer the means to control the unit when you're away from home. Window kit

A portable air con unit uses both a fan and a compressor to cool the air, and that's a noisy process, meaning you're likely to have to turn the TV up quite a few notches if you have one running in a living space. And, if you're a light sleeper, then you may struggle to sleep whilst the air con unit is running. So whilst the best fans definitely work to cool a person thanks to the breeze they create that does a surprisingly good job of cooling the skin, only an air conditioner can dramatically lower the temperature of an entire room or living space. And only an air conditioner will deliver that fridge-like cold air we all crave in a heatwave. Do portable air conditioners cost a lot to run? You're likely opting for a portable air con unit because you would like it to be... portable! However, in reality, even the best portable air conditioners are both bulky and heavy, weighing from 20kgs for a smaller 'lightweight' air conditioner to 30kgs+ for more powerful units. If you're spending this much on an appliance – and one that's going to take up a good deal of storage space in the home – then you might want it to do more than just cool.

in-1 Features: Make use of our four multi-purpose operating modes, including air cooling, dehumidifying, fan-only and heating mode to seamlessly meet all your cooling needs. We found the the best bet is to run the air con unit in a bedroom for a few hours before you want to go to sleep, and then turn it off once you turn in for the night. This has the effect of dramatically reducing the temperature in the room. In our tests, we found the best portable air conditioners, used in a well-sealed room, could reduce the temperature by up to 10 degrees in under an hour.