Darbar Hall, Rashtrapati Bhawan

To preserve the monumental status a hidden air conditioning system was installed.
Required grill velocities were determined to make sure the throw of air was not felt.
To maintain the temperature of 23°C at the occupant height, a strategy was worked out to be used as the nine existing stone grill and the top atrium hole.
Air flow rate required need was calculated for 600 occupants.
Additionally temperature of treated fresh air need was determined.