11 Lighting installations; heating installations; installations and apparatus for refrigerating; installations and apparatus for desalination, namely, desalination units and water desalination plants; installations and apparatus for drying, namely, drying apparatus for chemical processing; installations and apparatus for air conditioning; installations and apparatus for regulating water supply; installations and apparatus for regulating water supply, namely, water filters; installations and apparatus for gas separation and gas storage; installations and apparatus for gas separation and gas storage, namely, separators for the cleaning and purification of gases; incinerators; heat accumulators; cooling and freezing apparatus, namely, cooling filters; water treatment apparatus and installations, namely, purifiers, filters, separators and cleaners for the use in purification of water; distillation apparatus and columns not for scientific purposes, for industrial use and for chemical processing; chimney flues; pressure regulators for water and gas installations; safety accessories for gas pipes, namely, flashback arrestors and reverse flow check valves; regulating accessories for water supply, namely, metered valves; installations relating to membrane filtration technology for water, fuel and organic compound treatment, namely, modules and membrane cartridges for separation and purification of water, fuel and organic compounds; water, fuel and organic compounds filtering apparatus incorporating compound filter membranes for industrial, biotechnological, pharmaceutical, medical and scientific purpose; apparatus for use in purification of fuels and biofuels, including ethanol, fuel gas, fuel oil and mineral fuel; apparatus incorporating membranes for use in purification of fuels and biofuels, including ethanol, fuel gas, fuel oil and mineral fuel; apparatus for use in purification of air and of water; separators and filters in the nature of membranes for cleaning and purification of gases; gas separation membranes being part of separators for the cleaning and purification of gases