A low surface temperature (LST) heating apparatus

摘要

A low surface temperature (LST) heating apparatus comprising a heat source (1); a multiplicity of upwardly extending conduits (9) in front of, and spaced apart from, the heat source (1) but arranged such that the conduits (9) are heated by the heat source; and a cover (5), the cover (5) being arranged to substantially enclose the conduits (9) and the heat source (1). The conduits (9) are arranged such that, when they are heated by the heat source (1) a natural convection current is created.