Apparatus for lighting, namely, lighting installations; heating installations; steam generating installations; refrigerating installations; drying apparatus for use in heating, ventilations systems, air conditioning systems and refrigeration systems; ventilating apparatus for HVAC systems, apparatus for regulating water supply and sanitary purposes; HVAC systems comprising HVAC units, vents, lines, coils, thermostats, furnace, heat exchanger, condensing unit, refrigerant lines, fans for HVAC ...