I live in a house from 1909, with a heat pump (bergvärme). We probably use 18000 kWh for hearing in a year, 64800 MJ, at 190 m2 plus basement. 30000 MJ wouldn’t

I live in a house from 1909, with a heat pump (bergvärme). We probably use 18000 kWh for hearing in a year, 64800 MJ, at 190 m2 plus basement. 30000 MJ wouldn’t be enough for us I guess.