Duct fans FR-DF Series
FR-DF series duct fans (also known in the industry as centrifugal fans) are reliable devices designed for direct installation in ventilation ducts. They are designed to effectively transport air over longer distances and are perfectly suited for smaller warehouses, shops, workshops and production areas, as well as in commercial facilities or single-family homes (e.g., kitchens and bathrooms).
FR-DF duct fan
In this category, we offer a proven and highly optimized series of units, designed to support demanding ventilation systems.
FR-DF
A robust solution designed for small and medium-sized facilities as part of a ventilation system. Equipped with an integrated mounting bracket and spigots, as well as thermal motor protection up to 150°C. Can operate as a supply or exhaust fan.
FR-DF EC
A radial duct fan with an EC motor for ventilation systems in commercial, production, and warehouse facilities. Stepless performance control via a 0-10 V control signal allows the unit's operation to be matched to current demands.
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Why choose
FR-DF duct fans?
High external static pressure guarantees significantly higher air transport performance through long and complex duct systems compared to standard axial fans.
Universal design allows the unit to operate as both a supply and exhaust fan, which eliminates the need to install two different models.
Built-in thermal protection protects the motor from exceeding a temperature of 150°C, increasing the safety of the entire system.
Air flow capacity from 250 m³/h to 1,450 m³/h allows matching the unit to various facility scales, from a single room to larger duct systems.
The motor protection rating of IP44 ensures safety against dust and water splashes, while the durable galvanized steel housing protects against corrosion.
FR-DF fan — technical parameters summary
| Product name | Max. air flow | Voltage | Motor power | Noise level | Net weight |
|---|---|---|---|---|---|
| FR-100-DF | 250 m³/h | 230 V / 50 Hz | 67 W | 63 dB | 3.1 kg |
| FR-125-DF | 350 m³/h | 230 V / 50 Hz | 68 W | 65 dB | 3.1 kg |
| FR-150-DF | 550 m³/h | 230 V / 50 Hz | 110 W | 67 dB | 4.3 kg |
| FR-160-DF | 550 m³/h | 230 V / 50 Hz | 110 W | 67 dB | 4.4 kg |
| FR-200-DF | 1,000 m³/h | 230 V / 50 Hz | 160 W | 68 dB | 5.3 kg |
| FR-250-DF | 1,100 m³/h | 230 V / 50 Hz | 165 W | 68 dB | 5.6 kg |
| FR-315-DF | 1,450 m³/h | 230 V / 50 Hz | 225 W | 70 dB | 7.3 kg |
What do you gain with the FR-DF series fans?
Exceptionally simple and quick installation — integrated mounting bracket and connection spigots
Every duct fan in this series comes factory-equipped with an integrated mounting bracket and matching connection spigots. This allows for instant integration of the unit into circular ventilation ducts and stable suspension of the entire structure, reducing installation time to a minimum.
Budget protection — galvanized steel, 150°C thermal protection, and low power consumption
The galvanized steel housing effectively protects against degradation, while the integrated thermal protection up to 150°C prevents permanent motor damage in the event of overloads. The models offer an excellent ratio of power consumption (starting from just 67 W) to the generated static pressure, optimizing the costs of ongoing energy consumption in the facility.
Versatility of applications — supply or exhaust operation, from domestic rooms to industrial facilities
The FR-DF fan can be installed at any point in the system, working equally effectively as a supply support or as an exhaust for stale air. It performs excellently in commercial facilities (warehouses, shops, workshops), industrial areas, as well as in single-family houses (kitchens, bathrooms, toilets), where being hidden inside the ventilation duct ensures it does not disturb the interior aesthetics.
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The choice depends primarily on the system architecture. A standard axial fan moves huge volumes of air, but it does so effectively only against low system resistance. A duct fan (with a radial design, like the FR-DF model) is specifically engineered to handle high air resistance. If your building requires long duct runs with multiple bends, elbows, or dampers, the higher external static pressure and performance of the FR-DF fan will guarantee proper air exchange at the very end of the network.
Every model in the FR-DF series features an integrated mounting bracket, enabling secure and stable installation directly inside circular ventilation ducts. The unit can be mounted at any point along the system, working equally effectively as a supply support fan or as an exhaust fan drawing out stale air from demanding spaces (such as bathrooms or workshops).
Definitely yes. While these products are frequently used in various industrial facilities, their application in houses or apartments is equally beneficial. Their main task in rooms with an increased risk of pollutants (such as toilets, kitchen areas, or bathrooms) is the effective removal of stale air, along with associated inconveniences like excessive moisture and unpleasant odors. Since this equipment is mounted deep inside the ventilation ducts, it remains completely hidden without disrupting the aesthetics of your interior. A duct fan concealed in the pipeline also best isolates noise from areas where household members spend time.
Thanks to its robust galvanized steel housing, FR-DF units feature high resistance to corrosion. An IP44 protection rating safeguards the motor against solid objects over 1 mm in diameter and water splashes from all directions. Additionally, the thermal protection cuts off power if the critical temperature of 150°C is exceeded, protecting your investment from destruction.
Yes, the modern motor in the FR-DF series allows for seamless compatibility with external speed controllers. Our range includes various sizes (each with its own unique designation depending on the variant). Each one is designed to connect with piping of different connection diameters. Due to highly diverse requirements during the installation design stage, key parameters such as power and capacity must always be selected according to the individual needs of the building. Check the tabular comparison above to see which solution matches the specifics of your conditions.