The details Ultra-low energy and eco-friendly designPowerful air throw makes it great for spot coolingIdeal for medium to large rooms up to 50m²Great for commercial spaces as well as domesticQuiet coolingAutomatic swinging louvres for better air distributionLarge water tank and pump protectionChoose from three fan speeds for a powerful breezeIt's easy to move it from room to room using the built-in handles and castorsNo permanent installation or exhaust vent is required - Simply fill the tank with water and switch it onUse the timer function and set it to automatically switch on or off after a set amount of time . This powerful 3-in-1 air cooler is perfect for any time of year. Not only does it keep you cool when it starts to heat up outside it also functions as an air purifier and humidifier to improve the air quality within your room whenever needed. Arctic42ER cooler can also be used as a humidifier to help combat the dry air that can have a negative effect on those with respiratory conditions and allergies.Arctic42ER is a really powerful air cooler that doesn't require any venting like an air conditioner would do. It doesn't need installing either and is ideal for rooms up to 50 sqm.As well as being simple to set up the cooler is really simple to use. The digital control panel gives you quick and easy operation of all the multiple functions including the three fan speeds breeze and oscillation modes. There's also a handy timer setting that can be used to automatically switch on or off after a set amount of time up to 12 hours so you can have it run throughout the night and not have to wake up to switch it off. You can even take control of the cooler using the remote control that comes supplied. Essential info Air cooler humidifier and air purifierEasy to use digital controlsHigh efficiency honeycomb cooling padsRemote control included3-speed fan with breeze and oscillation modeUltra low energy and eco-friendly42 litre water tank and ice box1-12 hour timerDimensions (L x W x H) 44 x 34 x 97 cmWeight 11.5Kg More info Power 150WAir flow (at high speed) 4500 m³/hPower supply (V) 220-240Integrated carry handle and durable castor wheelsSleep ModeDirectional louvres12 Month hassle free warranty View Instruction Manual » The Techie StuffThe Arctic42ER is an evaporative air cooler that cools the air by means of evaporation. When water evaporates into the air the result is a mixture of air and water molecules. This chemical change requires heat which is taken from the water molecules resulting in a spot cooling effect the temperature drop. The air is passed through a special honeycomb cooling pad which expands the evaporation surface and improves the cooling effect while doubling as an air filter. The evaporative coolers must be used in rooms or spaces with good ventilation otherwise the room will get saturated with humidity and the effect of cooling will stop.. Evaporative cooling occurs to every one of us perspiration is the way our body reduces its temperature by evaporation when we are too hot..