This document contains details of an HVAC design project for an 8-floor office building with a total area of 21,000 square feet in Chennai, India. It includes calculations of cooling and heating loads, air distribution system design with ductwork and air terminals, specifications for water-cooled chillers and air-cooled chillers to provide a total of 350 tons of cooling, and coordination of the mechanical, electrical, and firefighting systems to ensure there are no clashes.