Vents 125 VKO Axial Inline Fan 185m³/h

An axial duct fan for 125 mm ducting, rated 185 m³/h. UV-resistant ABS, IPX4, 0.48 kg.

The 125 VKO sits between the 100 and the 150. With an axial fan you choose that size differently than with a centrifugal one, and that is worth explaining.

Choosing on length, not on volume

For ordinary extraction you work from the volume of your space: cubic metres times sixty for one air change per minute. That holds as long as your fan actually gets that air through your system.

With an axial fan that is the question. It moves air well while resistance is low, but every metre of ducting, every bend and every grille counts against it. The quoted 185 m³/h applies with nothing attached.

So here you choose on the length and straightness of your run rather than on the volume of the room. A short, straight metre-long through-run: you will get close to what the box says. Five metres with two bends and a grille: expect considerably less, and then a size up or a different type of fan is the better choice.

If in doubt, take the larger size. At these prices the difference is small, and an axial fan running with margin keeps more in practice than one that looks exactly sufficient.

Construction

Casing and impeller are UV-resistant ABS. The motor is maintenance-free, rated for continuous duty and carries an overheating cut-out. IPX4. Switchable from a room light switch or controllable with a thyristor controller.

Technical Specifications:

• Power draw: 16 W
• Current: 0.1 A
• Duct: 125 mm
• Capacity: 185 m³/h
• Type: axial, for low resistance
• Material: UV-resistant ABS
• Protection: IPX4, motor with overheating cut-out
• Control: light switch or thyristor controller
• Weight: 0.48 kg

Frequently asked questions

Will I get 185 m³/h in my setup?
Only on a short, straight run. Ducting, bends and grilles cost an axial fan relatively much.

Is 125 mm enough for my tent?
For a tent with a carbon filter an axial fan is not the right choice at all. Look at the VK or TT ranges.

Can I control the speed?
Yes, with a thyristor speed controller.