Abstract: A heater includes a lower supporting unit, an upper supporting unit and a burner. The upper supporting unit includes pillars and two end elements. Each of the end elements includes a disc connected to an end of each of the pillars, positioning recesses for receiving and hence positioning the ends of the pillars, and at least one aperture. The lower supporting unit is connected to the disc of one of the end elements. The burner is connected to the disc of the remaining end element and includes a fuel pipe extending throughout the apertures of the end elements.