Spiral Duct Grille – 525mm x 125mm
£41.96
Spiral Duct Grille Vent – Single Deflection (Vertical Blades) for Round Ductwork
Our Spiral Duct Grille Vent is specifically designed for direct mounting onto circular spiral ducting, providing a clean, professional air supply or extract termination with directional airflow control. Built from durable galvanised steel and shaped to match round duct diameters, these grilles deliver a tight fit, fast installation, and long service life in commercial and industrial HVAC systems.
The single-deflection vertical blade design allows adjustable air direction, making these grilles ideal for spot supply, extract points, and exposed spiral duct installations where both performance and appearance matter.
✅ Key Features
-
Designed for direct fixing to round spiral ductwork
-
Curved flange matched to duct diameter for secure fit
-
Single deflection grille with adjustable vertical blades
-
Directional airflow control at point of discharge or extract
-
Manufactured from corrosion-resistant galvanised steel
-
No weld construction for clean finish and durability
-
Fixing screws included for quick installation
-
Compatible with optional rear sliding dampers for airflow balancing
🔧 Installation & Use
The grille mounts lengthwise onto the spiral duct surface and is secured using the supplied fixing screws. Vertical blades can be manually adjusted to direct airflow where required, helping improve throw pattern and room air distribution.
An optional rear sliding damper can be fitted behind the grille to allow airflow volume adjustment and system balancing (Sold Separately)
📐 Available Grille Sizes (Length × Height)
-
425 × 75 mm
-
425 × 125 mm
-
525 × 75 mm
-
525 × 125 mm
-
625 × 225 mm
📏 Grille Height Selection Guide
-
75 mm height — typically suits 150–355 mm duct diameters
-
125 mm height — typically suits 250–710 mm duct diameters
-
225 mm height — typically suits 450 mm+ duct diameters
📞 Need help matching a grille or damper to your ductwork? Our team is ready to assist.
Spiral Duct Grille Vent – Single Deflection (Vertical Blades) for Round Ductwork
Our Spiral Duct Grille Vent is specifically designed for direct mounting onto circular spiral ducting, providing a clean, professional air supply or extract termination with directional airflow control. Built from durable galvanised steel and shaped to match round duct diameters, these grilles deliver a tight fit, fast installation, and long service life in commercial and industrial HVAC systems.
The single-deflection vertical blade design allows adjustable air direction, making these grilles ideal for spot supply, extract points, and exposed spiral duct installations where both performance and appearance matter.
✅ Key Features
-
Designed for direct fixing to round spiral ductwork
-
Curved flange matched to duct diameter for secure fit
-
Single deflection grille with adjustable vertical blades
-
Directional airflow control at point of discharge or extract
-
Manufactured from corrosion-resistant galvanised steel
-
No weld construction for clean finish and durability
-
Fixing screws included for quick installation
-
Compatible with optional rear sliding dampers for airflow balancing
🔧 Installation & Use
The grille mounts lengthwise onto the spiral duct surface and is secured using the supplied fixing screws. Vertical blades can be manually adjusted to direct airflow where required, helping improve throw pattern and room air distribution.
An optional rear sliding damper can be fitted behind the grille to allow airflow volume adjustment and system balancing (Sold Separately)
📐 Available Grille Sizes (Length × Height)
-
425 × 75 mm
-
425 × 125 mm
-
525 × 75 mm
-
525 × 125 mm
-
625 × 225 mm
📏 Grille Height Selection Guide
-
75 mm height — typically suits 150–355 mm duct diameters
-
125 mm height — typically suits 250–710 mm duct diameters
-
225 mm height — typically suits 450 mm+ duct diameters
📞 Need help matching a grille or damper to your ductwork? Our team is ready to assist.
