11 Lighting, heating, steam-generating apparatus, namely, heat generators, water heaters, apparatus for refrigerating, namely, cooling domes, water distribution apparatus and sanitary installations, namely, water purifying units; water desalination plants; cooling appliances and installations, namely, steam accumulators, air conditioning apparatus for separating water droplets from gas streams, steam super heaters being steam heating apparatus; water cooling towers; distillation apparatus not for scientific purposes; heat exchangers not being parts of machines; air-conditioning apparatus and installations; fans for air conditioning apparatus; electrostatic dusting apparatus, namely, electrostatic precipitators; apparatus and installations for desulphurization of flue gases, namely, wet, dry, semi-dry and seawater-based desulfurization flue gas scrubbing apparatus; apparatus and installations for air purification purposes, namely, fabric filters, cyclones being air purifying apparatus, gas scrubbers and related dedusting equipment being air purifying apparatus; air filtering installations; filters for air-conditioning apparatus and installations; filters for cooling apparatus and installations; apparatus for gas purification purposes, namely, gas scrubbers; air filters for industrial installations; apparatus, devices and installations for eliminating the main pollutants from thermic processes, such as acid constituents, organic constituents, nitrogen oxides, dust and heavy metals, namely, electrostatic precipitators, fabric filters for use with industrial machines, cyclones being air purifying apparatus, gas scrubbers for the removal of nitrogen oxides (NOx) with selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) processes, and gas scrubbers for the removal of sulfur oxides (Sox), dioxins, heavy metals and other pollutants