Fans
Commercial, industrial and residential ventilation fans from Alpha Air — including the Elta fan catalogue, a genuine UK manufacturer brand we stock and support. From compact 100mm bathroom extract fans to 630mm industrial axial flow fans, every product page shows the lead time up front, and stocked models ordered by 3pm are despatched for next-day delivery.
Which type of fan do I need?
- Cased axial fans — long-cased and case-mounted axial flow fans such as the Elta Revolution SLC series, for in-line duct mounting on commercial extract and supply systems.
- Inline fans — duct-mounted fans for kitchens, bathrooms and commercial extract runs.
- Plate fans — panel-mounted axial fans for wall and enclosure ventilation.
- Box fans — self-contained acoustic box units for kitchen and commercial extract.
- Roof mounted fans — Elta CF roof-mounted centrifugal fans in single and three phase, with high-temperature CFHT versions up to 630mm.
- High temperature fans — for hot air and smoke extract duties.
- Hazardous & ATEX fans — for potentially explosive atmospheres.
- Bifurcated fans — Elta SB bifurcated axial fans with the motor out of the airstream, from 250mm to 630mm, for greasy or hot air.
- Residential fans — Elta LUXE intermittent extract fans (100mm to 150mm), DEXA single-room heat recovery and dMEV units, HAVA whole-house MVHR, MOXA MEV, SANO positive input ventilation and SAX window/wall axial fans.
Single-phase and three-phase industrial options are available across the range, and many models come in speed-controllable versions.
Domestic and whole-house ventilation
The residential side of the range goes well beyond simple extract fans. Elta DEXA single room heat recovery units ventilate individual rooms while reclaiming heat from the outgoing air; DEXA dMEV units provide continuous low-energy mechanical extract for compliance in new-build bathrooms and kitchens; HAVA units deliver whole-house mechanical ventilation with heat recovery (MVHR); MOXA handles centralised mechanical extract (MEV); and SANO positive input ventilation units cure condensation and stale air problems in existing homes by gently pressurising the property from the loft or a wall unit. Technical data sheets and installation guides are available to download on each product page, so you can check duty, dimensions and wiring before committing.
Controls and fitting accessories
Finish the installation properly with fan speed controllers and fitting accessories — fan flanges, fast clamps and flexible fan connectors in diameters from 100mm right up to 1000mm for vibration-free connections between fan and ductwork. Pair your fan with galvanised spiral ducting or flexible ducting to complete the system.
Why buy fans from Alpha Air?
We are a Leicester-based UK ventilation supplier: real stock, honest lead times shown per product, and free UK mainland delivery on orders over £400 ex VAT. If you are unsure which fan suits your duty, our team can help you match airflow, pressure and duct size before you commit.
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Bifurcated Fans
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Box Fans
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Fitting Accessories
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Hazardous & ATEX Fans
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High Temperature Fans
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Residential Fans
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Roof Mounted Fans
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Speed Controllers
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Cased Axial Fans
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Inline Fans
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Plate Fans
Types of Ventilation Fans
Inline Fans
Inline fans (also called duct fans or tube fans) mount within the ductwork run rather than at the point of extraction. This allows the fan to be positioned remotely — for example in a ceiling void or plant room — reducing noise at the grille. Inline fans are the most versatile type and are suitable for domestic, commercial, and light industrial ventilation. We stock models from S&P (TCBB, HCBB series), Blauberg (Turbo, Vents TT), and other manufacturers in sizes from 100mm to 630mm.
Case Fans
Case fans (also called box fans or cabinet fans) are enclosed in an insulated casing for noise reduction. They are commonly used in commercial applications where the fan is mounted in an accessible location such as a ceiling void and noise levels must be kept low. The insulated casing also provides thermal protection when handling warm air.
Plate Fans
Plate fans (also called panel fans or wall fans) are designed for direct wall or panel mounting where ductwork is not required. They provide high-volume airflow for through-wall ventilation in kitchens, factories, workshops, and agricultural buildings. Available in standard and fire-rated versions for kitchen extraction applications.
Choosing the Right Fan
The key specifications to consider when selecting a fan are:
- Airflow rate — measured in litres per second (l/s) or cubic metres per hour (m³/h). This must match or exceed the ventilation requirement for your space.
- Static pressure — the resistance the fan must overcome from ductwork, bends, filters, and grilles. Longer duct runs and more fittings require a fan with higher pressure capability.
- Noise level — measured in dB(A). Critical for offices, retail, and residential applications.
- Temperature rating — standard fans handle ambient air up to 40°C. Kitchen extraction fans must be rated to 300°C or 400°C for fire safety compliance.
- Duct diameter — the fan inlet/outlet size must match your ductwork.
Fan Accessories
We also stock speed controllers, backdraught shutters, flexible connectors, anti-vibration mounts, and mounting brackets to complete your fan installation. Flexible connections between the fan and rigid ductwork help isolate vibration and reduce transmitted noise.
Why Choose Alpha Air?
With many years supplying the ventilation industry, we offer expert advice on fan selection and system design. Not sure which fan you need? Call our technical team on 0116 246 0031 — we can calculate the required airflow for your space and recommend a suitable model.
Frequently Asked Questions
What size fan do I need for my room?
Fan sizing depends on the room volume and the required number of air changes per hour. For example, a kitchen typically needs 15-30 air changes/hour, while an office needs 6-10. Multiply the room volume (length x width x height in metres) by the air change rate to get the required airflow in m³/h. Contact us if you need help with calculations.
What is the difference between an inline fan and a plate fan?
An inline fan mounts within the ductwork and moves air through a connected duct system. A plate fan mounts directly on a wall or panel and exhausts air straight through without ductwork. Inline fans are quieter at the point of extraction and more versatile; plate fans are simpler to install for direct through-wall ventilation.
Do kitchen extract fans need to be fire rated?
Yes. UK Building Regulations require kitchen extraction fans in commercial kitchens to be rated for continuous operation at elevated temperatures — typically 300°C for 1 hour or 400°C for 2 hours. This ensures the fan continues extracting smoke and hot gases in a fire. We stock fire-rated fans from S&P and other manufacturers.
How can I reduce fan noise?
Use a larger fan running at a lower speed rather than a small fan at full speed. Install flexible connections between the fan and ductwork to absorb vibration. Consider acoustic flexible ducting or an inline silencer/attenuator. Mount the fan on anti-vibration pads and ensure ductwork is properly supported to prevent rattling.