Thanks Conqueror I will look into that....
Saddlers, I'm sure the guy can open a door under normal circumstances, the problem is that this is a small office in a college where they are already cramped for space.
This door (along with five others) along a corridor was specifically requested to be fitted with door closers about five years ago by the then fire officer. Surely then we cannot now just leave the door open because we have a disabled person using it?
(yes there are arguments that the room may not be suitable for a wheelchair user, but this is the office and if he wants the job he's got to use it,)
So my "outsider lookin in" view is that if the door shuts he may have difficulty facing directly onto the door, to turn and grip the handle, and then manoeuver backwards with one hand.
Wizz, reason I put "30 seconds" (in quotes) was that I hoped people would have realised that this was not a fixed time period and was meant to be a "typical" time that may be variable and adjusted to suit the situation. And because I couldn't be bothered to list every possible variation to do with a timer.
Big assumption i know.
However I do take your comments on board regards the smoke detection, except that this will mean a lot of hastle having to rewire detection circuits to incorporate relay bases etc.