The RBW LL-Q8D evaporative air cooler offers an effective, low cost cooling option in areas with hot and low humidity. It can reduce up to 5°C to 8°C in case put in open space (recommended humidity level is 60% or less for maximum efficiency). The low power consumption (only 100-Watt) use nearly 80% less electricity than air-conditioners and use no ozone damaging refrigerants. This unit is ideal for indoor use in open environments with adequate cross ventilation up to 30 m3 . Four fan speeds and automatic oscillating louvers evenly distribute cool air through the honeycomb cooling media while the dust filter cleanses the air. Castor wheels and a convenient handle allow for effortless movement between rooms.