Abstract: Water outlet fitting, e.g. tap or shower head, producing a combined flow of gas and water, and power connector therefor An apparatus produces bubbles of pure water from a flow emitter (11) comprising an annular water outlet (13) surrounding a gas outlet (12) and operating within a defined parameter space. One or more flow emitters may be incorporated into an emitter body (10) configured as a shower head or a tap. In another aspect, an apparatus produces bubbles of water from coaxial, gas and annular water flowpaths. In another aspect, a magnetic power connector is arranged to supply electrical energy to a shower head.

Abstract: A phase change material (PCM) pack (1) for an air conditioning system comprises phase change material sealed between a first thermally conductive layer (2) forming a first outer surface of the PCM pack and a second thermally conductive layer (2) forming a second outer surface of the PCM pack. At least the first or second outer surface of the PCM pack takes the form of a substantially planar surface having defined therein a plurality of depressions (4) deviating from the planar surface towards the interior of the PCM pack in a direction perpendicular to the planar surface. The depressions improve heat transfer between the pack and an airflow passing over the surface of the PCM pack.