Firth Court, Western Bank, Sheffield S10 2TN. Number 105 on the University Location Map.
Here you will find:
Firth Hall is located in Firth Court which is an old red brick building on the northern side of Western Bank. To get to Firth Hall, enter the main entrance which faces Western Bank, walk up the main staircase and when you get to the first floor you will be facing Firth Hall.
You can get a copy of the University Location Map by visiting the SSiD which is located in the Students' Union building or download it from the Information for Visitors web pages.