Apparatus and installations for lighting, heating, cooking, refrigeration, drying, ventilating, air conditioning or steam generating; power generating apparatus; central heating boilers; electric boilers; central heating systems and boilers; condensing boilers and gas fires; micro combined heat and power systems; solar heating panels; domestic central heating apparatus; domestic appliances for refrigerating; domestic cooking appliances; solar heating apparatus; solar thermal hot water systems; biomass fuelled heaters; ground source heat pumps; air source heat pumps; ventilation systems which recycle hot air; water heaters; installations, units and apparatus for treatment of water; light bulbs; domestic appliances, cookers, fires, wall heaters, convector heaters, fan heaters, microwave ovens, hearths, showers, hobs, ovens, toasters, sandwich toasters, coffee percolators, hair dryers, deep fat fryers, kettles; freezers; tumble dryers to include gas and electric tumble dryers; electric heaters; electric storage heaters; light bulbs; fluorescent lamps; heating controls; hot water cylinders; electric showers; parts and fittings for the aforesaid goods.;