Opposite blade dampers are composed of several blades that each turn on their own axis. Thanks to the mechanism that unites them, these blades rotate at the same time in opposite directions from one another.
Opposite blade dampers, are formed by numerous blades that turns on its own axis. Thanks to the mechanism that joins them, the blades turns in opposite directions at the same time.
The opposite blades are the most appropriate ones when it comes to maintain a uniform distribution of the air flow right after the damper.