Can an openable window be fitted to an internal wall?

[CARL S]

I have an office in a nursing home that has no window, but all the four walls are internal so there is no option of having a window that opens outside. 

To add some natural light and airflow a window has been requested, but as this would open into another area of the home (corridor/escape route) how could an openable window be safe? 

Surely only a non openable fire resistant window can be fitted? 

[AnthonyB]

You've answered your own question.
 

You could in theory have a fire resistant fixed window and a separate ventilation grille with a combined fire/smoke damper linked to the fire alarm in the wall, but they wouldn't be up for the cost of all that I suspect... 

[CARL S]

I thought as much, thanks. Even if a fire proof openable window could be found, how could it be guaranteed that the window would be closed in the event of a fire, it couldn't. 

Cost would also definitely be an issue with this! 

[Mike North]

The best option is an un-openable fire resisting glazing panel in the wall and a wall fan