EC centrifugal fans: select directly by airflow and static pressure
EC centrifugal fans build the motor and impeller into one assembly, run more efficiently than a same-size AC fan and accept 0-10V/PWM stepless control — so selection comes down to three numbers: airflow, static pressure and mounting envelope.
This page collects the centrifugal fan models built on EC external-rotor motors so you can compare airflow, static pressure and mounting size side by side. The efficiency advantage of EC shows up best at part load: as speed drops, input power falls on a near cube law, so ventilation systems that modulate save far more energy than AC equivalents throttled by dampers.
Selection points
- Fix the operating point first: take static pressure from the real system resistance, never from the fan nameplate maximum.
- Then match the control signal: 0-10V and PWM tie into HVAC and heat-pump boards; choose a Modbus variant when remote monitoring is required.
- Check the supply: EC models span single-phase 100–280 VAC and 24/48/310 V DC — verify site power before swapping an AC fan.
- Leave inlet clearance: anything blocking the inlet side raises noise immediately; keep at least one impeller diameter free.
Model comparison
| Model | Airflow | Max static pressure | Power | Noise | Voltage |
|---|---|---|---|---|---|
| BC310A-E092E3-02 | 2500 m³/h | 715 Pa | 240 W | 74 dB(A) | 230 V AC |
| BC310B-E092E3-01 | 2500 m³/h | 615 Pa | 175 W | 71 dB(A) | 230 V AC |
| BC310A-E092D3-01 | 2100 m³/h | 715 Pa | 160 W | 64 dB(A) | 230 V AC |
| BC280B-E092E3-02 | 2000 m³/h | 460 Pa | 200 W | 65 dB(A) | 230 V AC |
| BC310A-E092D1-01 | 1950 m³/h | 715 Pa | 160 W | 64 dB(A) | 115 V AC |
| BC280A-E092E1-02 | 1800 m³/h | 715 Pa | 220 W | 77 dB(A) | 115 V AC |
| BC280A-E092E3-02 | 1800 m³/h | 715 Pa | 200 W | 77 dB(A) | 230 V AC |
| BC310B-E092E1-01 | 1750 m³/h | 615 Pa | 175 W | 71 dB(A) | 115 V AC |
| SF160D-E092B3-02 | 1700 m³/h | 705 Pa | 180 W | 62±2 dB(A) | 230 V AC |
| SF160D-E092B3-42 | 1690 m³/h | 705 Pa | 240 W | 60±2 dB(A) | 230 V AC |
Specs are taken from each model's product page — full curves, dimension drawings and certificates live on the model pages. Models not listed can be browsed by series in the product catalogue.
Frequently asked questions
Can an EC centrifugal fan directly replace my existing AC fan?
Usually yes — check three things first: mounting holes and overall dimensions, supply voltage (EC models accept a wide input range), and the control signal (0-10V/PWM or a local potentiometer). After the swap, calibrate the speed so airflow matches the original operating point.
How much energy does an EC fan save over AC?
It depends on the duty, not on a fixed percentage. At full speed the gain comes from motor efficiency alone; at part load EC slows down electrically while AC is throttled with dampers, and the gap widens sharply. Estimate from your actual operating curve — we do not quote blanket percentage promises.
What are the MOQ and lead time for EC centrifugal fans?
Standard models support small trial orders. MOQ and lead time vary by model and quantity; the price ranges shown on this page are FOB reference ranges, and the final quotation prevails.