clay stone
Only clay stone save very good heat. It gives this heat delayed about approximately 10 hours out to the room. So the solar energy, which at noon is absorbed by the windows, can be use as an extra heat source in the evening.
Only clay stone save very good heat. It gives this heat delayed about approximately 10 hours out to the room. So the solar energy, which at noon is absorbed by the windows, can be use as an extra heat source in the evening.