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GDL is a privately owned manufacturer and supplier of a large range of louvre systems, air diffusers, grilles, natural ventilation systems, brise soleil and dampers.
7. Grilles











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FULLY SEALED SLIMLINE DUCT DAMPERS
The blades are extruded aluminium airfoil section with pvc seals and stainless steel side seals.
HEAVY DUTY DUCT DAMPERS
For control and balancing of supply and extract air systems where high pressures and velocities may be experienced.
DUCT DAMPERS
The angles of the blades are adjusted via the robust, hand operated, lockable quadrant or with an optional extended spindle suitable for motorisation.