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Blauberg Motoren specialises in backward curved centrifugal fans from 133 mm to 250 mm for the most common AHU and HVAC duty points, with impellers up to 630 mm for high-airflow plenum and fan-wall applications. Every centrifugal fan is available with EC, AC or DC motors from 25 W to 5.5 kW, so OEMs can standardise on one supplier across the full product line.
EC backward centrifugal fan with free-running impeller on an external rotor motor. Non-overloading power curve, high static pressure, 133–630 mm — the standard choice for AHU, CRAC and ventilation OEMs.
Pre-balanced backward curved impeller, EC motor and electronics on one mounting plate — plugs into AHU casings, plenum chambers and fan walls without a scroll housing.
An EC centrifugal fan combines a centrifugal impeller with an electronically commutated (EC) brushless DC motor and integrated electronics. It runs on AC mains, converts internally to DC, and offers 0–100% variable speed with typically 15–30% lower energy use than an AC centrifugal fan.
A backward curved centrifugal fan runs free without a scroll housing, reaches higher static pressure and efficiency, and has a non-overloading power curve. A forward curved centrifugal fan (blower) moves more air at a lower speed in a compact scroll housing and is quieter at low pressure — ideal for fan coil units and air curtains.
"EC plug fan" and "EC plenum fan" describe the same product: a backward curved impeller and EC motor mounted on a plate that plugs into an AHU or plenum chamber and discharges radially without a housing. Several plug fans in parallel form a fan wall (fan array) with built-in redundancy.
310 VDC plug fan, Approx. 2180 m³/h maximum airflow and Approx. 690 Pa maximum static pressure.
24 VDC plug fan, Approx. 1950 m³/h maximum airflow and Approx. 550 Pa maximum static pressure.
24 VDC plug fan, Approx. 2180 m³/h maximum airflow and Approx. 690 Pa maximum static pressure.
48 VDC backward centrifugal plug fan, Approx. 1740 m³/h maximum airflow and Approx. 880 Pa maximum static pressure.
48 VDC backward centrifugal plug fan, Approx. 1440 m³/h maximum airflow and Approx. 730 Pa maximum static pressure.
24 VDC backward centrifugal plug fan, Approx. 1500 m³/h maximum airflow and Approx. 670 Pa maximum static pressure.
24 VDC backward centrifugal plug fan, Approx. 1430 m³/h maximum airflow and Approx. 730 Pa maximum static pressure.
24 VDC backward centrifugal plug fan, Approx. 800 m³/h maximum airflow and Approx. 690 Pa maximum static pressure.
Blauberg EC external rotor centrifugal fans are specified by HVAC OEMs and facility engineers in 90+ countries — in air handling units, data center CRAC and CRAH units, commercial refrigeration, industrial ventilation, air purification and new-energy thermal management across North America, Europe, Asia-Pacific and Australia.
The supply and extract fans decide most of an HRV/ERV's Specific Fan Power. Blauberg EC backward curved fans overcome heat-exchanger and filter pressure drop at over 60% system efficiency; EC forward curved blowers suit compact ceiling and wall units where a low-noise scroll housing is needed. Both modulate 0–100% on 0–10 V, PWM or Modbus to balance supply and extract and stay within ErP 2026 SFP limits.
Replace belt-driven centrifugal fans with an EC plug fan array to modernise existing air handling units without changing the casing. The BL-PF modular fan grid works with the STG-VFD central controller, adjusting speed from differential-pressure sensing to hold constant airflow — eliminating belts, grease and external VFDs, and adding N+1 redundancy to every AHU.
Computer Room Air Conditioning (CRAC) and CRAH units run 24/7. Blauberg EC plenum fans deliver the high static pressure, Modbus variable-speed control and low noise that precision cooling demands, and their non-overloading backward curved impeller protects the motor when filters load. Operators use them to cut cooling energy and improve PUE without compromising thermal protection for IT equipment.
Full coverage across refrigerated display cases, supermarket cold chains, freezer warehousing and cold logistics. EC fans operate reliably at −25 °C, delivering 30%+ energy savings versus AC motor equivalents with zero-maintenance sealed bearing design.
EC plug fans and fan walls for new AHUs and belt-drive retrofits. Housing-less backward curved impellers plug straight into the fan section, hold constant pressure as filters load and give N+1 redundancy in 2×2 to 4×4 arrays — with 0–10 V or Modbus control to the BMS.
Ultra-quiet, high-efficiency airflow for residential and commercial air purifiers, HRV/ERV fresh air units and medical clean rooms. EC cross-flow and forward-curved centrifugal fans in ultra-slim housings with speed modulation via Modbus.
As global public EV charging points are projected to grow from ~4 million (2023) to over 15 million by 2030 (IEA), thermal-management demand for charging cabinet cooling and energy storage BMS is surging. Blauberg DC/EC compact fans — 12 V / 24 V, high reliability, long service life — are the preferred choice.
Serving cooker hoods, residential fresh air units, air purifiers, tumble dryers and dishwasher exhaust systems. The full EC external rotor motor range starting from 30 mm offers ultra-compact design, low vibration, low noise and wide-voltage compatibility, fully certified for all major global markets.
3D blades provide ultra-quiet operation and zero belt-dust contamination. Filtered exhaust, negative-pressure control and continuous operation for biosafety cabinets, FFUs and medical equipment.
Rooftop and plant-room FATUs move 100% outdoor air through filters, coils and heat recovery — a high-pressure duty that suits the EC backward curved plug fan. Constant-pressure control holds design airflow as filters load, and Modbus lets the BMS trim outdoor air to occupancy for lower fan and coil energy.
Hot/cold aisle containment and in-row coolers need compact, high-pressure fans that follow IT load. EC backward curved fans in parallel give N+1 redundancy per module, modulate 0–100% on differential pressure and report status over Modbus — lowering PUE without sacrificing thermal protection.
Battery energy storage containers and cabinets rely on forced air to keep cells within their temperature window. Blauberg EC and DC centrifugal fans deliver stable pressure through filters and louvres, run on 24/48 V or 230 V, and are IP55-rated for outdoor enclosures with long, maintenance-free service life.
Outdoor telecom cabinets run unattended in dust, rain and −40 to +55 °C ambient. Compact EC/DC centrifugal blowers provide filtered forced ventilation and heat-exchanger airflow with 48 V DC supply, tacho and alarm output, and speed that tracks cabinet temperature to save energy at partial load.
CT gantries, MRI gradient amplifiers and power cabinets dissipate kilowatts in a room where patients expect quiet. Low-vibration EC forward curved blowers and backward curved fans give high airflow at low noise, precise speed control and 50,000 h bearing life, with medical EMC and safety certification support.
Industrial 3D printers need controlled chamber airflow for part cooling, plus filtered fume extraction. Compact DC/EC centrifugal blowers deliver stable pressure through HEPA and carbon filters, PWM speed control synchronised with the print job, and quiet operation on the shop floor.
An EC centrifugal fan pairs an IE5-class permanent-magnet motor with a backward curved impeller. Compared with a belt-driven or AC forward curved centrifugal blower, it uses 15–30% less energy, needs no external VFD, and stays efficient across the full speed range — meeting EU ErP 2026, ASHRAE 90.1 and Australian MEPS requirements.
0–100% continuously variable speed via RS485, 0–10 V DC, or PWM. Enables constant-pressure, constant-flow, or constant-torque operation modes.
Overall system efficiency >60%. 15%–30% more efficient than comparable AC fans. EC motor + optimized backward-curved aerodynamics deliver maximum air per watt.
Multiple EC fans wired in parallel form a Fan Wall. If one unit fails, remaining fans auto-compensate airflow — ensuring uninterrupted system operation.
MODBUS protocol integration for building automation systems. Real-time motor status monitoring, fault alerts, remote start/stop, and energy consumption logging.
Built-in protection against overload, overvoltage, undervoltage, locked-rotor. No external protection components required. Continuous self-monitoring.
Direct-drive: no belts, couplings, or lubrication. Sealed maintenance-free bearings rated to 50,000 h service life. EC motor eliminates brush replacement.
360° continuous rotation adjustment. Supports horizontal, vertical and inclined orientations. Compact footprint enables tight-space installations.
Backward-curved impeller + no mechanical commutation + skew magnetization technology. Measured noise values up to 60 dB(A) max — significantly quieter than AC equivalents.
Is your air handling unit more than 10 years old? Belt-driven centrifugal fans are typically the largest single energy consumer in an HVAC system, often 40–50% of a building's fan power. An EC plug fan retrofit in a commercial building or data center usually pays back in 2–2.5 years through energy savings alone.
Replacing the AC motor and belt drive with an integrated EC centrifugal fan removes the frequency converter, shielded motor cable and external motor protection — and adds Modbus monitoring for free.
Get a retrofit proposalManage everything yourself
Filter products by airflow, static pressure and electrical conditions. Performance curves, critical data, dimensional drawings and related files are presented together, reducing repeated look-ups and back-and-forth confirmation.
Suzhou Blauberg Motoren Technology Co., Ltd. is a specialist in EC brushless motors and intelligent fan solutions — delivering precise, maintenance-free, energy-efficient air movement across the full product lifecycle.
Complete EC centrifugal fan catalogue: backward curved centrifugal fans, EC plug / plenum fans, forward curved centrifugal blowers and DC centrifugal blowers, 133–630 mm — dimensions, performance curves (m³/h · CFM · Pa · in. wg), wiring and Modbus control interfaces. Enter a work email and the PDF download starts immediately.
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