Fire and smoke air transfer grille which provides a solution to the problem of containing both fire and smoke in emergency conditions yet offering good air transfer through apertures in elements of building construction.

Features and benefits:

Can provide up to 120 minutes fire and smoke resistance.
Using the same intumescent configuration as the LVH44 but incorporating an electro mechanically operated smoke shutter mechanism.
Contains cold smoke plus toxic gases remote from source of fire.
Simple installation.
Auto reset plus failsafe.
Safe low DC voltage.
Status reporting plus auto-cycling via Talkback Damper Control Monitor (DCM).
Optional audio warning facility.
Connects to fire panel plus/or building management system (BMS).
BMS alarm notification via Alarm Monitoring System (AMS).
Nominal 5 mA current open/ closed.
Max 200 mA in operation.
Allows bi-directional airflow.
Use with talkback damper control system. Optional Alarm Monitoring System (AMS) and battery backup. Optional cover grille.
Other non-standard sizes may be available - consult the manufacturer for details.
Performance: Can be used to provide up to 120 minutes resistance to fire + cold smoke. EI rating of 120 minutes when used in conjunction with a cover grille.
Orientation: LVH44S is best suited in the vertical plane.
Positional requirements: The upper edge of the grille shall be no higher than 3000 mm from floor level. The lower edge of the grille shall be no closer than 400 mm to floor level.
Minimum wall depth: Minimum wall thickness 95 mm.
Free area: 30–37% free area (approximately). Size dependent.
Material: Z275 galvanized steel. Metal slats with an intumescent core. Electro mechanically operated smoke shutter mechanism.
Fixing: Each fire and smoke air transfer grille is manufactured to size. When ordering please ensure the aperture can accommodate the non-combustible housing and allow up to a 5 mm gap around the perimeter. Screwed and bedded in Lorient intumescent sealant.