In addition to the classical air to water, soil to water, water to water heat pumps , the German producer Dimplex has a portfolio of ground/air to water heat pumps known as System Zero (a 2017 patent) and  heat recovery controlled ventilation Passivhaus certified equipment.

DIMPLEX – ventilation controlled with heat recovery

Dimplex heat recovery ventilation systems are a reliable and efficient ventilation solution with a high level of comfort for homes, offices, laboratories, cafes, restaurants, workshops, hotels.

DIMPLEX – System Zero

System Zero prima pompa de caldura sol/aer-apa, brevatata in Germania care utilizeaza energia reziduala de la sisteme de frig industrial , procese industrial , servere folosind ca surse de caldura in paralel: solul, aerul, apa.