Apparatus for lighting, namely, lighting installations; heating installations, steam generating installations, refrigerating installations; drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; air ventilating apparatus for HVAC systems; apparatus for regulating water supply and sanitary purposes, namely, heating and cooling valve actuators in the nature of thermostatic valves; HVAC systems comprising primarily of HVAC units, coils as pa...