I have more than 20 years experience in Mechanical Engineering field specially HVAC work to finalize any type of design ,estimation,tendering and cost reduction Auto cad drawings any type of building like residencial , commercial and multistored buildings.-Design of hvac cooling load calculations.-Design of duct work.--AUH selection.-Chiller selection.-Pump selection.-Exhaust.-Ventilation.-Fresh air Calculations.-CFM calculations............etc