Preventive maintenance, installation and repairs in HVAC systems (Chillers, water pumps, fancoils, splits, centrifugal fan, gas heaters, boilers, air handling units, refrigeration towers...) in hospitals and Malls. Electric and control system test, Fault finding. Perfomance design, maintenance planning, project management, operation, commissioning and audit in HVAC centralized systems. Supervision, leadership and training. Reports of energy, operation, safe and healthy, maintenance and business. Design of ventiIation and heating proyects for comercial and residential fields. Study and design of ventilation and heating systems in comercial and residential fields. Structural calculate for residential field. LEED certification for residential field.