Building wall for accommodating fire place has ceramic external tube and ceramic internal tube arranged coaxially and annular gap is present between two tubes and supply air for combustion is led to annular gap

摘要

The building wall (1) has a grate arranged over a fireplace (2). The fireplace has external tube (12) made of ceramic material and internal tube (11) also made of ceramic. The two tubes are arranged coaxially and an annular gap is present between the two tubes and the supply air for combustion is led to the annular gap.