Which models, airflow ranges and motor types are available for Backward-Curved Centrifugal Fans?

47 models in 8 series, airflow 450–2,500 m³/h, motor types AC / DC / EC. Full parameters are listed on each series page.

Which certifications apply to the fans used in Backward-Curved Centrifugal Fans?

ISO 9001:2015 covers motor design and production; CE (LVD), RoHS, REACH and CCC test reports are available for the motors. UL documents are provided on request.

What are the MOQ, sample and lead time for Backward-Curved Centrifugal Fans orders?

MOQ, sample policy and lead time depend on model and quantity. Send the model and annual volume and we will confirm within one business day.

Products

Backward-Curved Centrifugal Fans

In short: 8 series (47 models) cover 450–2,500 m³/h, up to 815 Pa static pressure for Backward-Curved Centrifugal Fans.

Backward-curved impellers keep efficiency high as pressure rises, which makes them the default for AHUs, heat pumps and compact air-handling equipment. The BC range spans 133 mm to 710 mm with EC, DC and AC motor options.

Families: 8
Models: 47
Airflow: 450–2,500 m³/h
Motor types: AC / DC / EC

How to choose

Pick the smallest impeller that meets the duty point at 60–70 % of its free-air flow; running a larger wheel at part speed adds noise and cost without airflow benefit. BC impellers can also run without a volute, mounted on a support inside the unit casing as a plug fan (plenum fan).

Recommended series

BC133 Series 4 models EC · 450 m³/h

BC175 Series 5 models DC / EC · 540 m³/h

BC190 Series 6 models DC / EC · 620 m³/h

BC220 Series 6 models AC / DC / EC · 920 m³/h

BC225 Series 9 models AC / DC / EC · 1100/890/750 m³/h

BC250 Series 7 models AC / DC / EC · 1400/1800 m³/h

BC280 Series 5 models EC · 1540 m³/h

BC310 Series 5 models EC · 1950 m³/h

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Related engineering guides

How to Choose a Centrifugal Fan (CFM, Pressure) A step-by-step guide to selecting a centrifugal blower — airflow (CFM/m³/h), static pressure (Pa), voltage, motor type and speed control, mapped to SUNXFAN's full lineup.

Frequently asked questions

How do I choose a fan for Backward-Curved Centrifugal Fans?: Pick the smallest impeller that meets the duty point at 60–70 % of its free-air flow; running a larger wheel at part speed adds noise and cost without airflow benefit. BC impellers can also run without a volute, mounted on a support inside the unit casing as a plug fan (plenum fan).
Which models, airflow ranges and motor types are available for Backward-Curved Centrifugal Fans?: 47 models in 8 series, airflow 450–2,500 m³/h, motor types AC / DC / EC. Full parameters are listed on each series page.
Which certifications apply to the fans used in Backward-Curved Centrifugal Fans?: ISO 9001:2015 covers motor design and production; CE (LVD), RoHS, REACH and CCC test reports are available for the motors. UL documents are provided on request.
What are the MOQ, sample and lead time for Backward-Curved Centrifugal Fans orders?: MOQ, sample policy and lead time depend on model and quantity. Send the model and annual volume and we will confirm within one business day.

Need a selection check?

Send airflow, static pressure, voltage and ambient conditions — our engineers confirm the model and reply within one business day.

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