The Vase expension 12 litres 4sw09356-1 DAIKIN is a product that combines a heat pump and air conditioning system from DAIKIN. Its key features include a 12-liter expansion vase and the ability to provide both heating and cooling functions. The product offers numerous benefits such as efficient energy usage, reliable performance, and a compact design. Its unique selling points include the DAIKIN brand reputation for quality and the versatility of having both heating and cooling capabilities in one unit.