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Air Terminals, Grilles & Louvres | Alpha Tube UK
Ensure excellent airflow, ventilation control and clean aesthetics in your HVAC or passive ventilation systems with our comprehensive range of air terminals, grilles & louvres. Whether you’re working on commercial, industrial or residential projects, our products deliver durability, function & style.
Why Choose Our Air Terminals & Louvres
Optimal airflow & low noise: Our grilles, diffusers and air terminals are engineered for high free-area and low sound levels, maintaining comfort without compromising performance.
Versatile applications: Ideal for supply, extract and return air systems; also suitable for passive ventilation through walls, ceilings, or external fascias.
Customisable options: Bespoke grilles, diffusers and louvres available—including custom sizes, finishes, and specifications to match project demands.
Durability & weather resistance: External louvres built to withstand weather, often fitted with bird or fly mesh to protect against wildlife and debris.
Our Product Range
Air Terminals & Valves
Adjustable valves, extract/supply terminals & air flow control accessories. Balance airflow in toilets, kitchens, whole-house ventilation, etc.
Grilles & Diffusers
Egg-crate grilles, linear bar grilles, spiral duct grilles, swirl diffusers, and perforated plate grilles. Designed for style and function, inside or out.
Weather Louvres & External Louvres
External units with angled blades (e.g. single or double bank), bird mesh, made of durable materials like aluminium or powder-coated metal.
Passive & HVAC Components
Components used at start and end points of duct runs, controlling airflow, ensuring efficient ventilation.
Custom Solutions
Non-vision grilles, bespoke diffusers, special finishes and custom sizing—contact our team for tailor-made options.
Applications & Use Cases
Commercial & industrial ventilation systems
Residential systems for air supply, extraction or return
Passive ventilation in walls or ceilings
Weather protection and filtration for external openings
Ordering & Customisation
Free postage for orders over £250
Bulk discounts across the range
Contact us for custom sizes, finishes or bespoke specifications
Product Highlights
Egg Crate Grilles – Powder coated, high free area (≈90%), minimal obstruction to airflow.
Weather Louvres – Aluminium sections, 45° blade angles, fitted with mesh; ideal for external installations.
Extract Air Valves – Adjustable cores for balancing flow; simple installation.
Plastic Air Valves – Lightweight and ideal for low load extract/supply terminals.
Installation Tips & Best Practices
Measure and plan for correct free area and ducting layout to minimize pressure drop.
Choose material & finish suitable for environmental exposure, especially for external louvres (weather, corrosion).
Incorporate mesh or screening to prevent entrance of pests or debris.
Ensure the aesthetic of visible grilles/louvres matches architectural style.
Regular cleaning & inspection to maintain airflow and appearance.
Frequently Asked Questions (FAQ)
Q1: What is the difference between a grille, a diffuser and a louvre?
A: Grilles are usually fixed faceplates, diffusers distribute air evenly (often used in ceilings), and louvres are external or wall-mounted to protect from weather or offer passive ventilation.
Q2: Can you supply custom-size grilles and diffusers?
A: Yes — Alpha Tube provides bespoke sizes, finishes and specifications. Contact our team to discuss your requirements.
Q3: What materials are best for outdoor louvres?
A: Aluminium or powder-coated steel with corrosion-resistant finish; inclusion of bird/ fly mesh is highly recommended.
Q4: How do I balance airflow in my system?
A: Use adjustable air valves or diffusers with adjustable cores; ensure correct sizing and minimal bends to maintain efficient flow.
Contact Us
Need a quote or custom product?
Call 0161 339 8901 or email orders@alphatube.co.uk to discuss your requirements.
Benefit from free postage on orders over £250 and bulk discounts on large orders.