When fire alarm is activated.   All normal lights are turned off and emergency pathway lighting is turned on.   The HVAC fans are turned off.   The fire alarm also causes safety changes to the lighting circuits, fan/coils, and air pressure in the emergency stairwells.     Fire standpipe and sprinkler alarm systems.   Alarm and public address system with a central control station or fire command center.   Enables better energy management resulting in lower cost, reduced environmental impact and better comfort control.     High efficiency to warn and to communicate to human  comfort.   Ease of maintenance.     BACK