3-in-1 Evaporative Air Cooler with 27L Water Tank and 3 Speeds

Topping the range, the Costway 3-in-1 evaporative air cooler carries a generous 27L water tank for the longest run times between refills – the natural choice for larger living spaces, open-plan areas or all-day cooling where you don't want to keep topping up. It combines evaporative cooler, fan and humidifier in one portable unit, cooling refrigerant-free by drawing warm air over water-soaked pads. The payoff is very low running costs of just a few pence per hour, well below an air conditioner. The standout 27L capacity is what sets this model apart from the 15L and 20L versions: it simply runs longer before needing a refill, ideal for sustained use in a big room. Three speed settings let you tune the airflow from gentle to strong. To be honest about evaporative cooling, it works best in the UK's drier, hotter weather and becomes less effective above around 60–70% relative humidity, so treat it as a low-cost comfort cooler rather than a refrigerated air conditioner. The humidifier function adds moisture in dry, heated rooms, and fan mode provides airflow on its own. With no refrigerant, no exhaust hose and no installation, you just fill the large tank, plug in and roll it into place. For long-running, economical three-in-one cooling in bigger spaces, the 27L model leads the line-up.