Alpha Air Ventilation Supplies
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Elta SQU82/500-EC-3 Centrifugal Box Fan

Multi-discharge, double-skinned insulated centrifugal box fan with an IE6 EC or AC motor and on-site adjustable outlet, in four case sizes from 500-1020mm.

£2,465.00

20% VAT added at checkout

Made to order. Please allow 15-20 working days for delivery.

Order before 3pm today for delivery by Friday 9th October

SKU: SQU82/500-EC-3
Category:

Description

The Elta Qube SQU is a multi-discharge, double-skinned insulated centrifugal box fan built for high performance and energy efficiency. Available in four case sizes (500, 670, 820 and 1020mm) with backward-curved impellers, it can be specified with an energy-efficient IE6 EC motor or an AC motor compliant with (EU) 2019/1781.

Its double-insulated panels are filled with 25mm fibreglass acoustic insulation to reduce radiated noise, while a corrosion-resistant aluminium frame with painted aluminium corners adds strength and durability. Moveable panels allow the outlet position to be adjusted on site, either straight-through or at 90°, and the fan suits speed control and building management system integration depending on model. This makes it ideal for supply and extract ventilation in commercial kitchens, as well as offices, schools and industrial buildings, and it is backed by a 24-month warranty.

Key specifications

  • Case sizes: 500mm, 670mm, 820mm, 1020mm
  • Impeller: backward-curved aluminium (EN-AW 5754), 315mm to 630mm
  • Motor: AC three-phase or EC single/three-phase; IE6 on EC models
  • Motor rating: IP55 TEFC/TEAO
  • Insulation: 25mm double-skinned fibreglass-filled panels
  • Outlet: straight-through or 90°, adjustable on site
  • Ambient limit: 50°C (40°C for 3-phase EC)
  • Control: VFD, 2-10VDC, 4-20mA DC, PWM or potentiometer
  • Warranty: 24 months

Frequently Asked Questions

What is a box fan and when should I use one?

A box fan houses the impeller and motor inside an enclosed, usually acoustically lined casing, giving quieter operation than an open in-line fan and simple connection into duct runs. Use one where noise matters, where the fan sits near occupied rooms, or for kitchen and commercial extract systems. Our Elta box range spans small ceiling-void units up to large multi-discharge fans for commercial kitchens, offices, schools and industrial buildings.

Which box fan suits a shallow ceiling void?

The Elta Hideaway SH is designed exactly for that — a low-profile centrifugal box fan for very shallow ceiling voids, available in six sizes from 100mm to 315mm with air volumes up to 0.832 m³/s. It’s acoustically lined with Class O rated fire-resistant foam to minimise breakout noise, and its brushless EC motor gives precise speed control via potentiometer, 0-10VDC or PWM with low running costs.

What is a twin fan, and why would I specify one?

The Twinflow STDL contains two centrifugal fans in one casing with an automatic changeover panel: if the duty fan fails, the second takes over, giving built-in standby for systems that must not stop running. It comes in seven sizes from 125mm to 500mm, connects to standard circular ducting, and its EC motors provide stepless speed control via potentiometer or a building management system.

Can box fans be mounted externally?

Yes — the Singleflow SSDL and Twinflow STDL are engineered for external mounting, with 1.2mm galvanised mild steel casings, and both handle ambient temperatures up to +60°C. The larger Qube SQU has a corrosion-resistant aluminium frame with double-skinned insulated panels, and its moveable panels let you set the outlet straight-through or at 90° on site to suit the installation.

How noisy are box fans compared with inline fans?

Box fans are generally the quieter option because the casing contains the noise: the Qube SQU range uses double-skinned panels filled with 25mm fibreglass acoustic insulation, and the Singleflow, Twinflow and Hideaway ranges are acoustically lined as standard. Full sound data for every model is published in the technical datasheet on each product’s Downloads tab, so you can compare levels before specifying.

Delivery Information

Made to Order

This item is made to order. Please allow 15-20 working days for delivery.

Delivery Options

ServiceEstimated DeliveryCost
Standard Delivery (UK mainland)Next working day from dispatch£15.95 +VAT (£7.95 for small items)
Free DeliveryNext working day from dispatchFree on orders over £400 ex VAT
Click & CollectCollect from our Leicester branchFree
Scottish Highlands & Islands2-3 working days from dispatch£36.95 +VAT

Delivery Area

We deliver to all UK mainland addresses. Scottish Highlands and Islands deliveries may take a little longer. We are not currently delivering to Northern Ireland — Click & Collect remains available.

Questions about delivery? Call us on 0116 246 0031 or email sales@alphaair.co.uk

Returns Policy

Six-Week Returns — No Restocking Fees

We want you to buy with confidence. You can return any standard stocked item within six weeks (42 days) of delivery for a full refund — 100% of the item price, no restocking or handling fees. Trade and business customers get exactly the same rights as retail customers. See our Returns Policy for full details.

Return Conditions

  • Items must be unused and in original packaging
  • Custom-made, bespoke or powder-coated items are made to your specification and cannot be returned unless faulty
  • Items must be returned with proof of purchase
  • Return shipping costs are the responsibility of the customer unless the item is faulty

How to Return

  1. Contact our customer service team to arrange a return
  2. Pack the item securely in its original packaging
  3. Include your order number and reason for return
  4. Ship the item to our returns address

Faulty Items

If you receive a faulty or damaged item, please let us know as soon as possible — ideally within 48 hours of delivery, so we can claim against the courier on your behalf. We will arrange a free collection and send a replacement or issue a full refund. This does not affect your statutory rights.

Questions? Contact us at sales@alphaair.co.uk

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