Most notably, it offers a five-minute cooling time from 30 to 20 degrees and does the same in reverse.

Evaporative coolers try to get the same effect by blowing warm air over something cold such as ice packs, but they aren't aircon: we've created a portable air conditioner vs evaporative cooler guide to explain the key differences as well as the pros and cons. This powerful air cooler is also a humidifier and air cleaner that doesn't need a window venting kit or any permanent installation. Unless you’re a heavy sleeper and someone who can nod off in a hurricane, we would advise switching it on an hour or two before going to bed and keeping the door closed for maximum cooling potential.

You might find its basic smart features helpful, but it’s a shame there are no sensors to let you create conditional programmes. While a good air conditioner might pump out air that’s 15°C or more cooler than room temperature, the biggest difference I measured was a 2°C drop, measured at the grille, when using pre-chilled water with ice packs. With smart controls making it easy to use, this is a great choice if you actually want to cool the air without incurring the charges of running an air conditioner. A (cloth) window sealing kit is included with this Princess air conditioner and the smart device also has a water tank indication. As with other evaporative air coolers, the Princess Smart Air Cooler is nothing like as effective as a true air conditioner.

A BTU is a unit for estimating thermal heat and it’s an important little acronym when it comes to selecting the right air conditioner for your abode. We'd suggest using in small to average sized rooms ranging up to 20 square metres and the dehumidifying function can be used independent of the air conditioning function, allowing you to extract up to 26. Two airflow settings allow you to choose what's best for you at the time, and you can control it all from the comfort of your seat with a remote control. Granted, there's some noise – all portable AC will make a bit of a racket – so it’s not ideal suitable for use when you're actively sleeping, even in low speed mode, which registers 53dB on the decibel meter. The fan’s whine means I wouldn’t want it running overnight in my bedroom, but it did keep me cool while working on hot summer days.This device works to cool and purify the air around you, so you can work, rest or entertain in complete comfort and knowing that the air around you is pure. The Chillmax Air Pure Chill gives you the best features of both fans and an air conditioner in one, compact unit that’s also a night light. This powerhouse with a power of 1346 watts is suitable for a range of 100 m3 and easily cools your living-, work- or bedroom. The top-mounted electronic display is straightforward but you can always access its functions – cool, heat, dry and fan – using the remote control.