The iQool18 is fitted with super DC Inverter technology that's designed to cool and heat your room quicker (And quieter!) than non-inverter models. It's cheap to run too - saving you up to 60% on your energy bills compared with non-inverter models. Heating by heat pump is up to 4 times more efficient than electric heating, and half the cost of gas central heating. It's also exceptionally quiet, so you'll forget it's even there. The self-cleaning function helps to prevent the build-up of mould and bacteria which can cause unpleasant odours - For a fresher environment and long-lasting performance. Titanium gold fin anti-corrosion technology saves money on maintenance, improves air quality and prolongs the unit's life for years to come.