The GL is a wall mounted device is composed of
a set horizontally mounted blades that are normally closed and are
free to rotate about their horizontal axis.
This louvers serves as a not-return damper and
can be used at the exit terminal ducts and fans.
Model FBL series, fixed horizontal blade louvers
with 50mm blade spacing are particularly suitable for smaller intake
or exhaust applications , where a balanced appearance is required
when installed on external walls. Constructed from extruded aluminium
sections.