Centrifugal fan DD 10/10 M9N0 3F 4P 1V

Double-Inlet Centrifugal Fan DD 10/10 M9F1 3-Phase 4-Pole – Certified Industrial Performance

The double-width double-inlet (DWDI) centrifugal fan DD 10/10 M9F1, manufactured by NICOTRA Gebhardt, is a high-performance solution for industrial and commercial ventilation systems requiring high airflow at medium static pressures. Built entirely from galvanised sheet steel, with a forward-curved blade impeller and an optimised internal rotor motor, this fan delivers high efficiency, quiet operation and outstanding durability.

Key Technical Features:

The 1500 W three-phase motor with 4 poles reaches a maximum speed of 1420 rpm and is powered at 400 V / 50-60 Hz in Δ/Y configuration. IP55 motor protection and insulation class F ensure reliable operation even in dusty or humid environments. Maximum power consumption is 3616 W with a maximum current draw of 5.6 A. Speed is controlled via inverter drive, enabling precise airflow adjustment to match installation requirements.

Aerodynamic Performance:

With an airflow capacity of up to 7100 m³/h and static pressure capability exceeding 500 Pa, this fan covers a wide range of applications. Performance curves are certified to AMCA 210/99, ensuring accurate design data. Sound power level reaches 74.7 dB(A) at the optimum operating point.

Construction and Dimensions:

The compact galvanised steel housing, with overall dimensions of 424.5 × 443 × 416 mm, allows easy integration into air handling units, plenum boxes or built-in installations. The low weight of 15 kg simplifies installation. Article number: 6109A9.

Available Options:

On request, the fan can be supplied integrated in a sound-insulated plenum BOX enclosure made of galvanised or RAL 9010 powder-coated steel sheet, with 6 mm or 10 mm insulation. It is also available in a plug & play configuration, complete with inverter speed control kit, ready to connect and operate.

Recommended Applications:

Shopping centres, office buildings, hotels, industrial facilities, professional kitchens, fresh air supply systems, exhaust ventilation systems.

Key Advantages:

• DWDI design for high airflow in a compact footprint
• Optimised internal motor with IP55 protection and Class F insulation
• Inverter speed control for energy savings and flexible operation
• AMCA 210/99 certified – laboratory-verified performance data
• Available in sound-insulated BOX enclosure or plug & play configuration
• Low weight (15 kg) for quick and easy installation

TECHNICAL SPECIFICATIONS:

FREQUENTLY ASKED QUESTIONS (FAQ)

Q: What type of fan is the DD 10/10 M9F1 and where is it used? A: The DD 10/10 M9F1 is a double-width double-inlet (DWDI) centrifugal fan manufactured by NICOTRA Gebhardt, designed for industrial and commercial ventilation systems. It is ideal for shopping centres, hotels, office buildings, professional kitchens, industrial facilities and any application requiring high airflow rates (up to 7100 m³/h) at medium static pressures.

Q: What does "double-inlet" (DWDI) mean and what are the advantages over a single-inlet fan? A: Double-width double-inlet (DWDI) means the impeller draws air simultaneously from both sides. The main advantage is achieving a higher airflow rate in a more compact footprint compared to a single-inlet fan of the same size, with lower noise levels and superior aerodynamic efficiency.

Q: What power supply does this fan require? A: The DD 10/10 M9F1 requires a 400 V, three-phase (3~), 50/60 Hz supply in Δ/Y configuration. It is not compatible with single-phase 230 V supply without additional modifications.

Q: How is the fan speed and airflow controlled? A: Speed is controlled via an inverter drive (the "1V" suffix in the product name). This allows continuous variation of airflow to match installation requirements, with significant energy savings at partial loads. The fan is available in a plug & play configuration with the inverter kit included, ready to connect and operate.

Q: What is the motor protection rating and can the fan be used in dusty or humid environments? A: The motor carries an IP55 protection rating, making it resistant to dust ingress and water jets from any direction. Insulation class F allows continuous operation at elevated winding temperatures. It is suitable for industrial environments with dust and moderate humidity, but is not certified for explosive atmospheres (ATEX) or heavily corrosive environments.

Q: What is the noise level of the DD 10/10 M9F1? A: The sound power level is 74.7 dB(A) at the optimum operating point. To reduce noise transmitted through the installation, the fan can be supplied integrated in a sound-insulated plenum BOX enclosure, which significantly attenuates noise to the surroundings.

Q: Can the fan be supplied integrated in a plenum box? A: Yes. On request, the DD 10/10 M9F1 can be supplied mounted inside a sound-insulated plenum BOX enclosure, made from galvanised or RAL 9010 powder-coated steel sheet, with 6 mm or 10 mm insulation. The recommended accessory is the BOX PLUS 10/10 plenum enclosure, available on ventilation.ro.

Q: What are the dimensions and weight of the fan? A: The overall dimensions are 424.5 × 443 × 416 mm (length × height × depth) and the weight is 15 kg. Exact flange and fixing hole dimensions are available in the technical datasheet PDF attached to the product page.

Q: Are the catalogue performance figures certified? A: Yes. The aerodynamic performance data were obtained in an AMCA-registered laboratory in accordance with the AMCA 210/99 standard for fan performance testing. While the data are not AMCA-certified, they are produced using a certified methodology, ensuring the accuracy of the airflow/pressure curves.

Q: What accessories are compatible with this fan? A: The DD 10/10 M9F1 is compatible with a full range of accessories available on ventilation.ro: BOX PLUS 10/10 sound-insulated plenum enclosure, inlet/outlet protective grilles, connecting flanges, hot water heating coils (70–90°C) and G4 air filters for fresh air supply systems.

Q: How can I place an order or request a quote? A: You can order directly through the quick order form on the product page, or contact us by phone at +40 722 667 239 or via WhatsApp for free technical advice and a personalised quote.