Reduce ventilation consumption with inverters

When fans waste more

Imagine your centrifugal electric fan, perhaps a workshop or factory model, running at the same speed day and night. In reality, its output varies. Sometimes it needs full air, other times only half. But without regulation, it consumes as if it were always at maximum power. The reason is that fixed motors don’t sense demand, resulting in higher bills, extra vibrations, annoying noise, and more frequent maintenance.

Many know this but think it costs too much to change everything. Yet there’s a simple trick that pays for itself in a year.

What is an inverter and why does it change everything?

Think of the inverter as a smart cruise control for your fan. Instead of turning it on and off or opening shutters, it slowly varies the motor’s speed by changing the electrical frequency. Lower rpm when needed, full throttle only when needed.

In your system, this means the right air at the right time. For example, if you reduce the speed by 20% (say, from 100 rpm to 80 rpm), the power required drops dramatically (power is proportional to the cube of the speed), and consumption drops by up to approximately 50%.

The benefits you see immediately

First of all, money.

A 7.5-kilowatt fan with an inverter saves 15,000 kilowatt-hours per year, or 44%, or thousands of euros. Payback period is 8 months. In an industrial case study, four units saved 183,000 kilowatt-hours per year just by adjusting their speed.

Then comfort.

It starts smoothly without any engine-stressing jolts, lasts twice as long, vibrates less, and makes less noise – up to 10 dB less. The airflow remains constant, the filters are clean, and there are no unexpected clogs.

A real-world example.

In a stable, inverters automatically manage speed with the climate, saving energy and improving animal welfare, while in foundries, we can achieve 20% lower consumption without replacing anything. It works because it adapts to your pace, not the other way around.

How to leave without complications

There’s no need to dismantle the entire system. Contact us for a free technical analysis. We start with precise measurements of pressure, flow rate, and current consumption—all it takes is a day on site. Then, once the inverter is selected, we calibrate it with a potentiometer.

We avoid missteps like choosing the wrong power or forgetting automatic feedback sensors. The result is a system that works intelligently on its own. You gain time, peace of mind, and tangible savings.

Is it worth it today?

European regulations are pushing for efficient solutions. The ErP 327 Regulation of 2011, updated by EU Delegated Regulation 2024/1834, imposes higher standards for fans starting in 2026. Those who act early avoid problems and save more, along with increasingly high utility bills. Many companies are already choosing inverters to reduce maintenance and increase flexibility, as the system runs slowly in the summer, speeds up during production peaks, and adapts effortlessly.