POWERFUL AIR COOLER WITH REMOTE: Industry-leading honeycomb waterfall system that passes warm air over ice cold water to distribute cold air throughout a room. Including a control panel and wireless remote control, giving you full access to all operational modes.

TIMER, NIGHTLIGHT & NEGATIVE ION AIR PURIFIER; You can set the unit to operate continuous or 1 - 12 hours according to your needs. Handy nightlight switch for an undisturbed sleep. Turn on the negative ion function to release large quantity of anions which help in the removal of airborne pollutants as small as .01 micron such as allergens, pollen, mold, smoke, pet dander, unpleasant odors, dust, and other airborne irritants. As such, we've rounded up the key features to look out for when sourcing the best portable air conditioner for your home. BTU (British Thermal Units) 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. There's no denying portable air con units are expensive, so if affordability is key then this Pro Breeze 9000 BTU 4-in-1 Portable Air Conditioner is certainly a winner on price. The next step was to try and narrow down our search even more. So we’ve already looked the prices of products in the Air conditioning category. Then we’ve also looked at the prices of products from Challenge. So this step combines the two and looks specifically at the price you’d expect to pay for Challenge branded products in the Air conditioning category.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. The next step after looking at products in the same category, was to look at products from the same brand, Challenge. More information on quality can be found in this old but still very helpful article from Harvard Business Review.

Most portable air con units come with an energy rating stated on their energy label to help you compare how many kW per hour the unit will use. How we test portable air conditioners

Wilko Beldray 6 Litre Air Cooler

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.