Grilles & Diffusers

Designed for efficient, balanced airflow, our grilles and diffusers deliver reliable performance across commercial, industrial, and high-use environments. We stock trusted ventilation brands including Domus and Systemair, offering high-quality solutions for residential, commercial, and industrial applications. 

Fixed or adjustable grilles control air entry and exhaust, while diffusers ensure even distribution and occupant comfort.

When specifying, match grille or diffuser type to design airflow rates, room size, and duct connections. Choose from aluminium, steel, or plastic finishes to suit installation conditions, including damp or high-traffic areas. Proper selection improves efficiency, reduces noise, and ensures compliance with UK building standards.

How to choose the correct grille

Selecting the right grille ensures balanced airflow, reduced noise, and energy efficiency. Choose from deflection grilles, egg crate grilles, or pressed steel grilles based on airflow, finish, and aesthetics.

Match size and airflow rate (m³/h) to duct dimensions to minimise turbulence, and select aluminium or steel for strength in demanding environments.

All eFans grilles are built for durability, precision, and reliable performance across residential, commercial, and industrial projects—backed by expert service and fast lead times.

How to choose the correct diffuser

Diffusers ensure consistent air distribution and comfort throughout any space. For broad coverage, ceiling diffusers are ideal, while linear or slot diffusers provide sleek solutions for offices or retail environments.

Opt for low-pressure-drop designs to maintain system efficiency and reduce fan energy use.

eFans offers a complete range of high-quality diffusers designed for easy specification, quick installation, and dependable results—trusted by contractors for their quality and performance.

How to ensure your grilles and diffusers perform optimally

Performance relies on correct specification and integration, not just product choice.

System compatibility: Match airflow design, duct layout, and room size to avoid drafts and inefficiency.

Material quality: Choose corrosion-resistant aluminium or steel for longevity in commercial or humid settings.

Air distribution: Pick grille and diffuser styles based on airflow patterns and deflection angles for uniform comfort.

Access and adjustment: Position adjustable grilles and valves for easy commissioning and maintenance.

At eFans, we help you specify confidently with products engineered for stable airflow, acoustic control, and compliance—supported by responsive customer service every step of the way.

Frequently Asked Questions

What materials are best for commercial or high-humidity environments?

Aluminium, galvanised steel, and corrosion-resistant finishes provide durability and consistent performance in demanding or damp environments. eFans products are engineered for long life and minimal maintenance.

Can a single diffuser serve multiple outlets?

Yes — in larger spaces, one diffuser can feed multiple ducts if airflow and pressure are correctly balanced. eFans diffusers support efficient, low-noise performance in complex layouts.

How do grilles and diffusers impact system efficiency?

Correct sizing and placement reduce turbulence, energy use, and noise. eFans components are designed for smooth airflow and consistent system performance.

Are there options for non-standard grille or diffuser sizes?

Absolutely. eFans offers Made to Order grilles and louvres for non-standard duct sizes or bespoke specifications, delivering a precise fit and fast turnaround.

What is the difference between linear, egg crate, and pressed steel grilles?

Linear grilles provide directional flow, egg crate grilles maximise free airflow, and pressed steel models offer strength for heavy-duty areas. eFans supplies all types with dependable quality and finish.