Rocks dug up during construction were saved and incorporated into the poured-concrete floors and walls. Hydronic heating coils in the floor are augmented by a wood stove during the damp winters.  Search “서산오피《bam7"넷》ᑅꏐ서산오피ꈆ밤의달리기┘서산업소꒑서산오피ꇏ㍇서산건마” from Diamond in the Rough (and Ready)

Search “서산오피《bam7"넷》ᑅꏐ서산오피ꈆ밤의달리기┘서산업소꒑서산오피ꇏ㍇서산건마”

Rocks dug up during construction were saved and incorporated into the poured-concrete floors and walls. Hydronic heating coils in the floor are augmented by a wood stove during the damp winters.