With cellar build certainly about future

Oil and gas becomes expensive. Even if you start with a cheap gas heating, only with a cellar you have later enough place for the change on renewable energy.

Here 850 liters of buffer store like by heating equipment and hot-water equipment with solar energy usually.

Who has only one foundation and compact gas heating, is later either forced to pay the rising gas prices, or he sacrifices living space for the housing of the voluminous equipment.