With the limited detail it's just a case of the standard routine K. There is obviously the very good flats guide, what fire resistance are the doors, how many stairwells are there, is there any combustibles in the stairway?
It's worth remembering fire doors injure more people than they save, 30,000 children alone are injured by fire doors each year. So the idea of having no force whatsoever is very advantageous.
Freedor (as most of you are aware I work Fireco who manufacture them) exceeds the requirements of EN1155 & EN1154 so it does better than what the European testing standards require and passed the fire test (EN1634) of 60 minutes +10%.
Freedor is battery operated, battery consumption is worked out at two years on the basis of 200 activations a year which is massively over estimated as most of the time they will just sit there.