Alpha Air Ventilation Supplies
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Elta SJMF100 Inline Mixed Flow Circular Fan

Inline mixed flow circular fan with a brushless EC motor, delivering up to 1.240 m³/s at up to 548 Pa across five sizes from 150-355mm.

£164.00

20% VAT added at checkout

Made to order. Please allow 2-3 working days for delivery.

Order before 3pm today for delivery by Wednesday 16th September

SKU: SJMF100
Category:

Description

The Elta Jetflow SJMF is an inline mixed flow circular fan that combines a high-efficiency double impeller with a brushless EC motor to deliver strong airflow at low energy consumption. Available in five standard sizes from 150mm to 355mm, it handles air volumes up to 1.240 m³/s and static pressures up to 548 Pa, suiting a wide range of commercial and residential ventilation duties.

Built for reliable, long-life operation, the SJMF uses sealed-for-life heavy-duty NWB bearings and an IPX4-rated motor that runs in ambient temperatures up to +60°C. It ships with a 1.5m mains lead and UK 3-pin plug, and supports flexible speed control via potentiometer, 0-10VDC or PWM, backed by a 24-month warranty.

Key specifications

  • Sizes: 5 standard sizes, 150mm to 355mm
  • Air volume: up to 1.240 m³/s
  • Static pressure: up to 548 Pa
  • Motor: brushless EC motor, IPX4
  • Bearings: sealed-for-life heavy-duty NWB
  • Operating temperature: up to +60°C
  • Electrical: BS1363-1 UK 3-pin plug with BS1361 3A fuse, 1.5m mains lead
  • Speed control: potentiometer, 0-10VDC or PWM
  • Warranty: 24 months

Frequently Asked Questions

How do I choose an inline duct fan?

Start with your duct diameter, then check the airflow and pressure the system needs. The Elta Versaline VL (100mm to 315mm) is a compact centrifugal fan for low-airflow, medium-pressure runs; the Jetflow SJMF (150mm to 355mm) is an EC mixed flow fan balancing airflow and pressure efficiently; and the Multiflow SEL (250mm to 710mm) covers larger commercial and industrial duties with air volumes up to 5.67 m³/s.

How do inline fans connect to ducting?

They fit directly in-line within a circular duct run. The Versaline VL has 25mm spigots that connect straight onto standard flexible or rigid circular ducting, secured with hose clips and sealed with foil tape — both of which we stock. The Jetflow SJMF and Multiflow SEL connect the same way in their respective sizes, and all three ranges match the standard duct diameters we sell in spiral and flexible form.

Can inline fans be mounted in a ceiling void, and in what orientation?

Yes — the Versaline VL is designed with integral mounting brackets for ceiling-void installation and works horizontally or vertically, while the Multiflow SEL can be mounted at any angle thanks to its weatherproof IPX4 casing. Compact dimensions across the ranges suit space-constrained projects. Always leave access for maintenance, and for very shallow voids consider the Hideaway SH low-profile box fan instead.

Are these inline fans speed controllable?

Yes. The Jetflow SJMF uses a brushless EC motor with speed control via potentiometer, 0-10VDC or PWM signal, and ships with a 1.5m mains lead and UK 3-pin plug for straightforward installation. The Multiflow SEL is offered with both AC and EC motor options in single or three-phase. Speed control lets you commission the fan to the exact duty the system needs and cut noise and energy use.

How quickly can you deliver an inline fan?

The Versaline VL range is a stock item with next-day availability, and the Jetflow SJMF is typically with you in a few days — the exact lead time shows on each product page before you order. Delivery is free on orders over £400 excluding VAT, so an inline fan ordered together with ducting, hose clips and grilles for the same job often qualifies.

Delivery Information

Made to Order

This item is made to order. Please allow 2-3 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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