Curvilinear wing anemostads are produced to be fixed-wing. Fixed-wing type
anemostad spreads air over a large area, that is, it is the type with little vertical
drop. In these two types anemostads have 1, 2, 3, and 4-way characteristics
according to the desired direction of the air to be distributed is being done.
Anemostad dampers are a separate unit of aluminum with opposite wings
or parallel winged.