Office building HVAC layout with floor and roof duct system plan

HVAC system drawing for an office building showing detailed floor plans and roof deck duct layout with ventilation, heating, and air conditioning components. The plan includes duct routing, air vents, return and supply lines, and mechanical units placement for each floor. Sectional views illustrate duct dimensions, risers, and alignment with ceiling and wall structures. Roof deck plan shows main HVAC units and duct connections. Dimension lines and structural grid references are included for precise installation. This AutoCAD files drawing helps engineers, architects, and MEP planners design, visualize, and implement commercial office HVAC systems efficiently.