Installation and maintenance of low and high voltage electrical industrial installations, public lighting, automation, home automation and electrical panels, air conditioning, heating and DHW, industrial cold, computer networks, pressure equipment, plumbing, gas, alternative energy and energy efficiency. Installation and maintenance of fire protection systems: fire detection and alarm, water supply, hydrants, equipped fire hydrants, dry column, extinguishing by automatic sprinklers and water spray, luminescent signaling, fire extinguishers, extinguishing gaseous agents, and smoke and heat control