There are other Fire suppression systems.
One of the problems is that some are dangerous to employees as they remove or substitute the oxygen in the room.
Look around he should be able to find something that would work. Perhaps he should call the Fire investigators and ask their advice.
Bingo.
Save the equipment at the possible loss of human life?
I have been in areas deprived of oxygen.
It snuffs out life just as well as it snuffs out fire.
Effa bunch of electronics.