We have a great range of high quality portable evaporative coolers available in a selection of sizes. These evaporative air coolers are effective and efficient cooling systems, designed to provide cool and comfortable air in hot and dry areas. Evaporative coolers are cost-effective, cheap to run and fairly simple machines that use the natural process of evaporation to circulate cool air around a space. They feature an internal water tank, a water pump, cooling pads and a fan. They pump the water from their water tank up to the top of the unit, where it flows back down and through the cooling pads. As this happens, the internal fan draws warm air into the machine and passes it through the wet cooling pads. This causes water droplets to evaporate into the air - a process which naturally reduces the temperature of the air, making it cooler and more comfortable. The internal fan then blows this cooler air out of the front of the machine to cool the space. Evaporative air coolers are best used in low-humidity well-ventilated areas. If the area is not well ventilated, condensation can often build up inside the space over time. Therefore it is best to have windows or doors open whilst using one of these machines inside a space. Evaporative coolers can be used in homes, shops, restaurants, bars, marquees, gyms, warehouses, factories and much more. They can even be used in outdoor spaces such as bar and restaurant terraces. Never use an evaporative cooler in an area that contains sensitive equipment or materials that could be affected by a rise in humidity, such as server rooms. Air conditioners offer the best option for cooling those areas.