DD is an aluminum double deflection grille with two rows of individually adjustable blades.
The grille is used for introducing or evacuating air and is intended for mounting on a ceiling, wall or rectangular duct.
The grille is provided with two rows of individually adjustable blades that allow the air jet to be directed in the desired direction.
The front blades are perpendicular to length and those in the background are parallel to the length of the grille.
The grille with dimensions ≥ 500 mm is provided with intermediate elements for stiffening.
As standard, the grille is manufactured with holes for screw mounting, except for the size 595×595 mm (external dimensions) for the false ceiling 600×600 mm.
The product is delivered with fixing screws.
If, on request, a mounting frame is required, then the grille is accessorized with fixing clips.
Ak [m²] - The free surface
Veff [m/s] - The effective velocity of air in the grille
∆Pt [Pa] - Pressure loss
X [m] - The length of the air jet at a speed of 0.25 m/s
NR [dB (A)] - Noise level without room attenuation
The data presented is for 100% open damper.
For more sizes see the Technical Data Sheet (bottom of the page).
The grille can be accessorized with plenum box (adapter), flow control damper or mounting frame.
Adapter (plenum box)
The adapter is made of Z140 galvanized steel sheet and is equipped with suspension lugs.
On request, the plenum can be insulated with 6 mm thick elastomeric rubber.
Opposed blade damper (OBD)
The damper is provided with opposable blades and gears, it is mounted on the grille connection for adjusting the air flow. The large dimensions are made in several pieces according to the table.
Mounting frame (CC)
The mounting frame is used when a hidden, easy and fast mounting of the grille is desired. Depending on the size required, it is made and delivered in one or more pieces.
As standard the grille is mounted by means of screws.
Optionally, for a hidden and easy assembly, a mounting frame can be used. The installation of the grille in the mounting frame is done by clamping.
Installation in wall or continuous ceiling with screws
Installation in wall or continuous ceiling with mounting frame