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Filter LONGWELL Centrifugal Blower Fan models by airflow, static pressure, voltage or size. Every model on the Fan Selector lists its measured or digitised curve, dimensional drawing and datasheet.
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Have your duty point?

See every LONGWELL model whose P-Q curve covers it — margins, noise and power included. No login.

Library: Ø25–1,000 mm, single units up to about 52,000 m³/h — larger duties go straight to an engineer. Prefer to talk it through? Send your specs to an engineer

Buying from LONGWELL

  • Brand owner since 1990
  • Yuyao, Ningbo
  • 12-month standard warranty, extendable to 18–24 months by project agreement
  • Reply within 1 business day

Certificates you can check

Each document covers only the models listed in it; ISO certificates cover management systems, not products. Declaration of Conformity for your model and destination on request.

All document scans and what each covers

Test & release at LONGWELL

Specified and drawn by LONGWELL, built to our drawings by qualified partner factories, inspected and released to LONGWELL standards.

  • Wind tunnel · AMCA 210 method
  • Semi-anechoic room · sound power testing
  • Outgoing sampling to AQL 2.5
  • Test records retained for 5 years

How ordering works

  1. Spec check duty point & drawings
  2. Samples 1–3 days (stock models), fee credited to first order
  3. Validation on your bench
  4. Order T/T 30/70 (first order)
  5. Production & release 15–30 days, partner factory
  6. Shipping & after-sales FOB · CIF · DDP
Full terms, QC and FAQ
Current book for Centrifugal Blower Fan

Centrifugal Blower Fan

Energy conservation is crucial today, especially in ventilation and air conditioning. Longwell has developed a complete product range of dual-inlet, direct-drive centrifugal blowers with efficient Brushless EC technology for these applications.

Our integrated motor electronics enable convenient, infinitely variable speed control of the EC fans. Up to three air flow levels can be programmed in “Constant Flow” mode, ensuring a constant air flow even if resistance changes, such as when filters become clogged.

Switching from a traditional fan with an asynchronous motor to our modern, energy-saving technology is seamless and requires no design modifications.

Longwell Centrifugal Blower Fans generate strong, steady airflow for heating, cooling, and air-cleaning systems. They are designed for efficiency, durability, and low vibration operation.
Featuring backward or forward curved impellers, Longwell blowers offer flexible performance options for different industrial and commercial ventilation needs.