The predecessor DHP-H took heat pump technology to a new level, but we've managed to move up yet another notch. Through new, innovative technology the DHP-H Opti Pro can operate at even higher annual efficiency, meaning it's possible to get more than 75% of the energy consumption from free solar energy stored in the ground or the water – making it the primary choice for anyone looking for an unbeatable level of comfort at the highest possible cost effectiveness.