Your energy consumption for heating could be lowered up to 75% compared to direct electricity with the use of NIBE ground source heat pumps.
NIBE produces 12 different types of ground source heat pumps, ranging from 5 kW to 60 kW that can cater for the smallest residential property to light commercial buildings. By using a cascade connection it is possible to achieve an output of 540 kW.
Installation manual - Ground collector,
Ground source heat pump