Heating, ventilating, purification apparatus and installations; lightning apparatus; water purification apparatus and parts therefore; water purification filters; desalination apparatus; water desalination plants; solar lights, lamps, panels or installations for collecting heat.

Treatment and transformation of materials; water treatment and purification; generating of electricity from solar energy; process water treatment; desalination (of water); water purification using membrane separation; brine treatment; removal of water from solid material or soil by wet classification, centrifugation, filtration, or similar solid-liquid separation; removal or concentration of specific chemicals from water; water treatment and purification in the context of resource concentration (namely extracting water from a waste stream) and resource concentration.