| 摘要 |
<p>In an assembly of flat hollow elements, partic. designed to produce a hot water heater, e.g. for local space heating in small buildings or apartments, and with external surfaces exposed to an upward flow of hot gases through the spaces between adjacent elements, from a burner of known type situated below them, the hollow elements are assembled with the end faces vertical and projecting w.r.t. the surfaces of the elements in such a way that together they form front and back faces of the heater with its ends being extended below the flat hollow elements in such a way that one of the walls so formed exhibits an opening for the introduction of a burner in the space below the elements.</p> |
