A compliant solution is one that meets the needs as laid out in the various building regulations. The most important elements here are related to fire compartmentalization within a building and the ability to escape through mechanical means in case of emergency, and not just a fire emergency; could also be pollution, terror threat, etc.
Those standards directly linked to life safety are: EN179 Emergency Escape for when the building occupants are aware of the building environment and EN1125 Panic Escape for environments used by the general public.
These standards state that even if a door is electronically controlled for access there must be a compliant mechanical means of escape in case of emergency.
The most cost effective solution is not necessarily a compliant solution.
Unlike magnets, Abloy electric locks provide a compliant solution, satisfying the needs of both fire doors and emergency/panic situations where a mechanical means of escape is the essence. Exit doors should not be reliant on a fire alarm or some other ‘power’ trigger allowing egress.