From the most basic surface-mounted closer to the BTS80 EMB (with electro-magnetic hold-open function), DORMA has a range of closers that meet NZS1905 Part One as well as ANSI and EN standards. While the fire-rated offerings are wide and varied, the type of closer will depend on the manufacturer of the fire or smoke door. To determine what closer is applicable and compliant, it is worth contacting the fire door manufacturer, who will have a list of certified hardware for each type of door.

This means the door and hardware will comply with the relevant standards. From there, the decision becomes more related to how you want the closer to function with the door and/or fire system. By considering functionality before compliance, you will help whittle down the number of appropriate closers for the job. For example, you may have a 60-minute fire door that requires hold open as a function. The other things to consider are whether the closer needs to be attached to a fire panel or if it is independent of that system.

Some DORMA closers are available with incorporated smoke detectors, hold-open Devices and free swing options. As long as the closer is approved for the door there should be no compliance issues. The DORMA TS93 EMR is a cam-action closer that incorporates an inbuilt smoke detector, electro-magnetic hold-open and power pack. In case of a fire alarm, or detection of smoke through the intergrated smoke detector, if the door is held open, a solenoid releases the hold-open device, allowing the door to close. Linking to a building management or control system takes away the need for a separate power pack while preserving the functionality of the closer.