Duct grilles with double adjustable vanes
A duct grille with double adjustable vanes has both vertical and horizontal slats. Both sides are adjustable, so the direction of the air stream can be controlled even more accurately. Duct grilles with double vanes are therefore extremely suitable for both supply and extraction. The grilles with double adjustable vanes are available in different sizes, so one will always fit on your spiral pipe. Please pay close attention to which grille you choose. For example, a 125 mm high duct grille fits on a 315 - 800 mm diameter spiral pipe, while a 225 mm grille fits on a 630 - 1400 mm diameter spiral pipe. Choose one of the categories below to view duct grilles with double adjustable vanes:
Spiral pipe diameter 150 - 400 mm | Spiral pipe diameter 315 - 900 mm | Spiral pipe diameter 630 - 1400 mm
Duct grille accessories
We also offer accessories for duct grilles, such as angled sliding valves. These sliding valves are mounted behind the grilles on the inside of the spiral pipe. These valves allow extra air to pass through the grille. This may be desirable if the grilles are used for supply. The sliding valves are also adjustable, allowing the air stream rate to be adjusted for each grille. The sliding valves are also available in different sizes, from 425x75mm to 1225x325mm!