Holyoake LR fire and smoke dampers have been meticulously engineered to thwart the spread of both fire and smoke between building compartments, preserving the barriers integrity. Featuring a low-leakage blade assembly, enhanced by a blade tip sealing ring; consequently, forming an impervious barrier against flames, smoke, and high-temperature gases.
LR fire and smoke dampers are exceptionally versatile, suitable for all applications: fire, fire and smoke, smoke, or air (smoke exhaust) dampers. In addition to these applications the LR damper can also be effortlessly adjusted to balance airflow. The clever design ensures installation, maintenance, and testing are swift and straightforward. Each unit is supplied with mounting flanges, a jubilee clip, and a patented heat shield for plasterboard applications.
LR Fire and Smoke Dampers Rating
Undergoing stringent testing in compliance with Standards AS 1530.4:2014 and AS 1530.7:2007, these dampers consistently maintained their integrity for over four hours and exhibited minimal smoke leakage below 50l/s.
As per the New Zealand Building Code:
The LR100 to LR250 dampers achieve an impressive Fire Resistance Rating (FRR) of -/240/- when installed in masonry walls/floors.
In addition to this the LR100 to LR250 dampers achieve -/120/- in plasterboard walls, timber-framed floors, Korok, and Hebel systems.
The LR300 and LR350 dampers meanwhile achieve -/90/- when installed in masonry walls/floors, plasterboard walls, timber-framed floors, Korok, and Hebel systems.
Additionally, the LR150 and LR200 damper sizes are now offered with an insulation rating as an air transfer grille. Allowing greater application flexibility, receiving a -/60/60 rating accordingly. For installation details contact your local branch.
These dampers are quick to install with a quick turnaround time to meet market demand. The LR dampers are available in seven diameter sizes, with options up to 350mm.
