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Air Terminals, Grilles & Louvres
We supply a wide variety of air terminals, egg crate grilles, air valves, 4-way ceiling diffusers, and external weather louvres — essential components for both the start and end of duct runs, or for passive ventilation through walls and ceilings.
Whether you’re working on a commercial, industrial or residential project, our products are suitable for a range of HVAC applications including supply, extract and return air systems. They’re commonly used to promote effective fresh air movement and help maintain good air quality throughout a building.
In addition to our standard product range available online, we also manufacture and supply bespoke grilles, diffusers, and louvres, including:
Non-vision grilles
Linear bar grilles
Spiral duct grilles
Swirl diffusers
Perforated plate grilles
Custom sizes, finishes, and specifications are available to suit your project requirements. For pricing or further information on custom-made items, please contact our team at orders@alphatube.co.uk.
Weather Louvre
Manufactured from aluminium sections, our louvres have a single bank of 45 degree blades complete with bird or fly mesh on the rear. Prevents rain or other small items from entering but allows air to flow at a high level.
*Please note* different sizes as well as rectangular sizes can be manufactured. Please enquire by telephone or email if you would like a quote.
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Egg Crate Grille
White egg crate grilles powder coated to RAL 9010. The grille has a 90% free area allowing large volumes of air to pass through with very little noise.
*Please note* different sizes and rectangular sizes can be manufactured. Please enquire by telephone or email if you would like a quote.
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Plastic Air Values
White plastic circular adjustable valves used for supply or extract terminals in a duct run.
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Fusible Links
We offer a large range of replacement fusible links which can be used in different ways in dampers, doors and vents. All of the common fusible links are in stock and for sale on this page - please enquire for other types if you cannot find them on our website.
Found in systems like fire doors, fire dampers, and sprinkler systems.
It’s a metal link engineered to melt at a certain temperature (e.g., 165°F or 74°C), releasing a latch, closing a door, or activating a sprinkler.
Common fire damper makes these are used on are: BSB, HVC, NCA, Advanced Air & Action Air (Swegon) Chubb Fire, Flaktwoods, A1 Shutters, Lindab Fire Dampers, Wolseley UK, Ascot Doors, Kidde Thorne & Gilberts.
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Extract Air Valve Metal
Extract air valves in white metal come complete with a screw on spigot for connecting flexible ducting easily.
The central core is on a screw to balance flow rate.
Air valves are commonly used in whole house ventilation, toilet extract, kitchen extract etc.
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