I have seen some awful examples of these devices being used.
one such example; 2 floors of 25m dead end corridors with single staircase at one end. virtually all rooms fire-doors to each corridor, and the fire-doors to the staircase were held open with an acoustic hold open device.
None had been maintained, ever!!! So when i arrived, virtually all of them didn't work. I was absolutely gobsmacked to see that staff were also wedging their devices to make it hold the door open, or, stuck a wedge in right next to it.
So I asked staff what they were. Not one of them could tell me. Here lies the problem in my opinion. Management.
Kurnal, i agree, a short term solution in this circumstance could be acceptable. part of that rationale is because it would eliminate some management and maintenance concerns. But not in the long term. Apart from compliance with BS7273 part 4. There are sometimes too many variables, in my opinion. Poor management, change of occupancy, staff, or use for example.