11 Air conditioning units and air cooling units for domestic and commercial use; bath pumping fixtures, namely, baths, kitchen and bathroom basins, sinks, faucets, shower heads, basin outlets, taps, toilets and water closets; plumbing pipes of plastic, metal and non-metal being parts of sanitary facilities; water heaters for domestic, commercial and industrial use; water heater apparatus, namely, instantaneous water heaters, storage water heaters, solar water heaters, geothermic heaters and condensing boilers, water intake apparatus, namely, pipes, valves, meters and pumps, water and gas apparatus, namely, hydronic heating, underfloor heating, gas fire heating and space heating, and pipes sold as a unit, water purification apparatus, namely, filters, UV treatment and carbon filters, and water purification machines, water sterilizers, water supply apparatus, namely, pipes, tanks, faucets, taps, valves, pumps and meters, and water pipes for sanitary purposes; heating apparatus, namely, solar heaters, electric radiators, central heating radiators, steam radiators and electric heating fans; ventilating apparatus, namely, air conditioners and heat pumps