I am a certified mechanical engineer, having good experience in HVAC system designing and execution, an expert in preparing HVAC shop drawings and as build drawings as well in auto cad. - Heat load calculations, heat loss calculations following ASHRAE standards. - Duct designing by constant velocity method, velocity reduction method, and equal friction method following SMACNA standards. - Preparing of concepts, schematic, tender, good for construction Drawings and BOQ, Estimation, Rate Analysis, Design Basis Report, Tender Documents.