Industrial Pedestal Fan for Workshop Cooling: 290 m3/min Case Study

What the integrator asked for

The brief was refreshingly short. An OEM integrator fitting out new warehouse and manufacturing sites needed a 750mm industrial pedestal fan on a cross-style base, running from a standard 110V, 60Hz North American supply.

It arrived with a reference photograph and a target specification sheet. As a result, the form factor was never in doubt. Airflow, meanwhile, had to reach 290 cubic meters per minute, or roughly 10,241 CFM. That figure comes from the job the fan does: spot cooling for people working along assembly lines and loading docks, where you are moving air across a person rather than through a duct.

Two constraints did the real work in this project.

• A hard ceiling of 65 dB(A), set by workplace noise exposure rules rather than by preference.
• Manual speed selection on the unit itself, since operators adjust it by hand.
• A cross base rather than a round one, so a single worker can reposition the fan without a forklift.
• Full technical drawings, needed for the integrator’s facility plans and its end client’s maintenance records.
• No digital controls at all, which turned out to be a deliberate choice rather than an oversight.

That last point is worth dwelling on. Plenty of suppliers would have proposed something cleverer. In this case, though, the customer had asked for a standard, reliable industrial pedestal fan. The specification was written that way on purpose.

Building the industrial pedestal fan

Here the project ran as LWIF-750U(S)-02 under a Longwell project manager. Almost all of the engineering effort went into one question. Which motor, and how much control?

Why an EC motor was the wrong answer here

We evaluated an EC motor and rejected it. That sounds odd coming from a manufacturer that sells a lot of EC product, so here is the reasoning. EC is more efficient and it modulates beautifully. However, this industrial pedestal fan plugs into a wall socket in a workshop. There is no building management system to talk to, so PWM or RS485 inputs would sit unused. Worse still, a 110V AC supply feeding an EC motor needs an inverter stage. That adds cost, and one more thing to fail on a dusty factory floor.

So the design went the other way, to a multi-tap AC motor built properly. The windings are 100% copper. In addition, a thermal fuse sits inside the motor rather than downstream of it. On a factory floor that fuse is the difference between a stalled fan and a fire.

Aerodynamics and the noise limit

A three-blade aluminum impeller does the aerodynamic work. Three blades is the compromise that lets this industrial pedestal fan reach 290 m3/min while staying at or under 65 dB(A). More blades would move air more quietly at low speed, but they cost airflow at the top end, which is where a spot-cooling fan spends its life.

The guard is heavy-gauge wire at 1.8 to 2.0mm. Consequently it satisfies the safety requirement without choking the inlet, which a finer mesh would.

The pedestal

Meanwhile the cross base was purpose-designed in steel. It beats a round base on an uneven workshop floor. Furthermore, it breaks down flat for shipping, which matters more than it sounds when a customer orders a container of them.

In short, the result is unremarkable in the best sense. A strong AC motor, sound mechanical construction, and nothing on the bill of materials that the application does not use.

Technical Specifications

The 260W power input at 110V provides significant air moving capability of 290 m³/min, making it suitable for large industrial spaces. A noise level of 65 dB(A) is within acceptable limits for most factory environments, providing cooling without significant acoustic disruption.

Technical Documentation

LWIF-750U-02 Technical Drawing & Specifications
The PDF contains the official engineering drawing and performance specifications, required by system integrators for layout planning and by facility managers for safety compliance.

Here the image shows the final configured product, which procurement managers use to confirm the physical design, including the cross-style pedestal base and protective grille.

Why the order came to us

Here the industrial pedestal fan itself is a standard configuration. What decided the supplier, therefore, were commercial and logistical points that matter to an integrator.

• Right-sized, not over-engineered. The customer needed performance without over-engineering, and specifying past that is how a large fit-out tender gets lost. We sized to the duty point rather than to the catalog ceiling.
• Drawings back quickly. This project went from sales input to approved drawings in a compressed timeframe. That speed comes from a short internal review chain rather than a long formal NPI queue.
• 110V is routine for us. After manufacturing in Ningbo since 1990, our lines are already tooled for multiple regional voltage standards. A North American variant needs no special setup and no extra lead time.
• Data you can put in a submittal. Airflow and acoustic figures are measured to AMCA 210/211 and ISO 5801 methods, so the integrator can hand them to an EHS officer without hedging.

Browse the full industrial fan range, where this industrial pedestal fan sits alongside wall and roof options, or the industrial axial fan series for ducted work. Workplace noise limits are set out by OSHA.

Questions integrators ask about this fan

How does the fan ship, and what assembly is needed?

It ships semi-knocked-down to cut freight cost and shipping damage. The box holds the fan head, the pole and the cross base separately, together with all fixings. As a result, one person assembles it in 10 to 15 minutes with ordinary hand tools.

What life should we expect from the AC motor?

The motor uses 100% copper windings and a thermal fuse. Moreover, it is rated for an L10 bearing life beyond 20,000 hours in typical conditions. Warranty on this HVAC series runs 18 months from factory receipt.

Is the speed adjustable?

Yes, through a built-in three-speed rotary switch on the motor housing. The published 1380 RPM and 290 m3/min figures are the top speed. External 0-10V or digital speed control is not supported, which was the customer’s decision rather than a limitation.

Would an EC version be available if we wanted one?

Yes, and it makes sense where the fans tie into a control system or run long hours at part load. For intermittent spot cooling on a wall socket, by contrast, the payback is poor. The AC version is the better buy.