A pressurisable paraffin burning system (40) comprises a manually re-pressurisable and transportable fuel supply reservoir (42) and a number of liquid fuel burner operable pieces of equipment (46) connected via fuel supply tubing (48) to the reservoir (42) once the system (40) is operatively installed. The reservoir provides for its direct connection to a number of pieces of equipment (46). The system (40) allows for controlling the fuel supply to the pieces of equipment (46) enabling the simultaneous use of a number of them. One of the pieces of equipment (46) is in the form of a geyser (56) comprising a water flow a mantle (12) within which a flue (14) is formed extending above a burner (16). The heat exchange configuration of the geyser (54) incorporates a number of airflow direction mounted plates (20) being heat conduction-fashion situated in a direct flame exposure location across the flue inlet while extending from the immediate vicinity of the inlet to the mantle (12), and a heated gas flow path layout in the form of a helically extending formation (22).