Heat load calculations for an industrial building using E-20 Excel sheets. Design duct routing, sizing, and ESP calculations using Duct Sizer software. Prepare AutoCAD HVAC drawings including supply, return, and exhaust layouts. Develop BOQ (Bill of Quantities) for ducts, fittings, grills, and equipment. Selected suitable HVAC equipment based on load requirements and system design. Handle cleanroomHVAC Projects HVAC design and execution for various pharmaceutical cleanrooms (ISO Class 8 & 9), ensuring compliance with GMP and ISO standards. Major Responsibilities: Airflow calculations based on required ACH and room classification. Designed pressure cascade for classified rooms. Supported installation, balancing, and commissioning of AHUs and duct systems. Coordinated with cleanroom vendors for HEPA filters,