Metal box 500M³/H

An insulated fan box in hot-dip galvanised steel with a Torin scroll blower, 500 m³/h, 160 mm flanges on both sides.

A box, or a fan in the duct

At this flow you could achieve the same with a 160 mm inline fan, which is cheaper and smaller. So the question is what a box gives back for that.

The answer is noise, and it goes further than a thicker wall. An inline fan sits inside the duct and is therefore rigidly connected at both ends to the rest of your installation. Everything it vibrates goes into the ducting and radiates along its whole length. A box hangs on its own, and the case around it is lined inside, so the impeller's noise is caught before it leaves the case.

On top of that, the motor in this version sits on shock absorbers, so its vibration does not run straight into the steel case.

The second advantage is pressure. See the 250 for the reason: a centrifugal fan holds its output against the resistance of a carbon filter where an inline fan falls away.

There are drawbacks too. A box is bulky, weighs 10 kg here, and needs somewhere to hang or stand. And it costs more. For a short run with no filter an inline fan is fine; as soon as a filter is attached and it has to be quiet, the box wins.

Technical Specifications:

• Housing: hot-dip galvanised steel, professional build
• Blower: Torin
• Acoustic insulation: fully insulated case, motor on shock absorbers
• Flow: 500 m³/h
• Power draw: 55 W
• Inlet: 160 mm flange
• Outlet: 160 mm flange
• Included: flanges, hanging hooks, plug

Frequently asked questions

Is a box always quieter than an inline fan?
At equal capacity, nearly always, because the case catches the noise before it gets out.

How much room do I need?
Count on the case size plus room to connect ducting straight at both ends.

What is the difference from the softbox?
In the softbox the blower hangs in rubbers rather than sitting on dampers, which cuts vibration transfer further.