Östberg CK inline duct fans, 100 to 315 mm

The Östberg CK (also written Ostberg CK) is an inline duct fan with circular connections. It has a backward-curved impeller, an external rotor motor with sealed ball bearings and a galvanised sheet steel housing, and is made to be installed in a duct system.

An inline duct fan sits inside the ductwork and moves air through it. Typical uses are toilet and bathroom exhaust, kitchen extract, fresh air to AC rooms, boosting airflow in long ducts, and general supply or extract ventilation in offices, shops, clinics and workshops.

Start from the airflow you need: room volume multiplied by air changes per hour. Typical design guidance in India is about 10 to 15 air changes per hour for an internal bathroom and 15 to 20 or more for a commercial toilet block. Then pick the CK whose curve gives that flow at your duct pressure. Send us the room size and duct run and we will confirm the model.

CK suits clean air up to 60 to 80 °C depending on the model, so it fits domestic and light kitchen extract and general ventilation. It is not made for grease-laden commercial hood exhaust, oil mist, flammable or corrosive fumes. Tell us the application first; for hazardous atmospheres we can offer explosion-proof fans such as Kruger MTD-EX.

The duct size stays the same; the letter marks the variant. In the data sheets, the later letter within a size has the higher power and higher maximum pressure, for example CK 100 A is 41 W with 319 Pa maximum and CK 100 C is 59 W with 350 Pa. Choose by the airflow you need at your duct's pressure loss, not by size alone.

On Östberg's website CK 100 C1, CK 150 B1, CK 150 C1 and CK 160 C1 carry the same article numbers (7000034, 7000043, 7000045 and 7000050) as the matching C and B models in our table. Other 1-suffix models, such as CK 315 C1, are separate versions with different data, so confirm the exact model before ordering.

They are the two ends of the fan curve: the flow with no resistance and the pressure at which flow falls to zero. A fan cannot deliver both at once. Real airflow depends on the resistance of your duct, bends, grilles and filters, so send us the duty point if you know it.

The data sheets state that a duct-connected fan can be installed outside or in damp environments, in any position. The junction box is IP 54 and the motor enclosure is IP 44 per the technical data. Please tell us about rain, dust or fumes so we can check the application.

Yes. The data sheets say a transformer or an electronic speed controller can be connected, and that motor protection is integrated.

Match the duct size of your tent or filter: 100 mm is 4 inch, 125 mm is 5 inch, 150 and 160 mm are about 6 inch, 200 mm is 8 inch, 250 mm is 10 inch and 315 mm is 12 inch. Work out the airflow from the room volume, allow extra for carbon filters, bends and silencers, and choose a CK that delivers it at that pressure. Add a speed controller to tune temperature and humidity. Send us the tent or room size and we will confirm the model.

Yes, as the exhaust fan and as a powered intake fan on ducted openings. A closed, insulated container usually needs both so the exhaust does not starve the room. Tell us the container size, lighting, crop and duct layout and we will size the pair. CK is for clean, humid air; it is not made for ammonia, corrosive or flammable gases.

The data sheets state a duct-connected CK can be installed outside or in damp environments. Keep the motor and junction box away from direct water spray and tell us about fertiliser or chemical fumes so we can check the application.

Press Buy on the model's row to send us a WhatsApp message, or tell us the model and quantity. We reply with a quotation. We are based in Chennai and handle enquiries from Tamil Nadu, Kerala, Karnataka and Andhra Pradesh, and from elsewhere in India on request.

Yes. We handle installation as well as supply. Tell us your site details when you enquire and we will confirm the scope.