K Circular Duct Fans

High-quality radial fan for circular ducts

Available with AC and EC motors
Indoor and outdoor installation
Reliable and airtight
Mounting bracket included
Noise and energy optimised impeller

Flexibility

The K fans are intended to use for supply or extract air, designed to be installed in any position. This ensures that the fans can be used in a variety of commercial and domestic applications.

Reliability

The unit’s airtight casing and corrosion resistance permits outdoor and indoor use. The combination of reliable casing and motor construction ensures, to minimise the need for maintenance of the fans and allows long continuous operation.

Performance

Sound-optimised radial impeller together with highly efficient external rotor motor are designed to ensure high-level performance to minimise power consumption and maximise efficiency.

Accessories

K fans can be selected together with variety types of accessories as fast clamps, heaters, filters, dampers, etc.

Systemair Accessories – the perfect match!

Save time in design and installation while ensuring the most optimal ventilation solutions for your project.

Explore benefits

Featured accessories for your K-fan

Mounting clamps for circular duct

ECBasic

Controller series with 0-10V analog output signal

LDC

Easily-fitted silencer for circular ducts where noise reduction is paramount

Construction

Casing made of galvanised sheet steel, corrosion class C3 is fully air tight class C according to EN1751. The fans are equipped with an external terminal box with protection class IP55.

Impeller

K fans use backward curved radial impellers. These are from lightweight, hard-wearing fiberglass reinforced polyamide, dynamically balanced and paired with corresponding external rotor motors.

Motor

Depending on type, K fans are equipped with AC or high efficient EC external rotor motors. All motors are suitable for 50Hz and 60Hz.

Motor protection

Fans with AC motors have integrated thermal protection with manual (electrical) reset. Size 100 and 125 has an impedance motor protection.

Fans with EC motors have an integrated electronic thermal protection including locked-rotor protection and soft-start.

Control

EC motor with built-in potentiometer to adjust working point can be also controlled by external signal 0-10V.

AC motor can be controlled by 5-step or stepless speed regulator.

Installation

K fans can be installed in any position indoor and outdoor by included mounting brackets . All models have a spigot with 25 mm length which is perfectly designed to connect circular duct by fast clamps preventing vibration to the duct.

Installation can be combined with filter boxes, sound attenuators, and other mechanical accessories from recommended list.