Daikin. Altherma 3 H MT & HT. Air/water heat pump outdoor unit. They are available in 6 classes: 8-10-12-14-16-18 kW. These units use only one fan, which significantly lowers the noise level. The black grille covers the entire front, making the fan invisible. The matt grey casing reflects the colour of the wall behind it for optimal discretion. Compressor with double injection. This can deliver outgoing water at a high temperature up to 65°C (MT) or 70°C (HT). Compressor insulation. Anti-vibration. These can be combined with 3 different indoor units.