LWCA-110820SN-06-12 Dual-Speed AC Cross-Flow Fan for Film Set

Customer Requirement

The client required a modification of the standard fan for creating controllable wind effects on set while filming. They requested to add a dual-speed setting on LWCA-110820SN-06 cross flow fan the without altering the standard model parameters. The fan’s airflow in two modes should have a noticeable difference. The initial order was 24 units.

Engineering Solution

Considering the client’s limited install area, the solution was to develop a custom-tapped AC motor winding instead of using an external VFD. LONGWELL’s motor engineers designed a new winding configuration by creating two stable operating points from the same motor. The modified LWCA-110820SN-06-12 creates two separate electrical taps. It can deliver the full 1250 RPM and the lower 625 RPM rotation. The airflow can be switched between the two modes of 875 and 1750 m³/h, providing a significant difference in wind effect. The other materials were kept the same as the standard model.

Technical Specifications

Parameter	Value
Model Number	LWCA-110820SN-06-12 (Dual-Speed Custom)
Voltage	220 V
Frequency	50 Hz
Speed (High / Low)	1250 / 625 RPM
Airflow (High / Low)	1750 / 875 m³/h (1030 / 515 CFM)
Static Pressure (High Speed)	255 Pa
Input Power (High Speed)	115 W
Noise Level (High Speed)	68 dB(A)
Overall Length (A)	916 mm
Housing Dimensions (WxH)	150 mm x 110 mm
Impeller Material	Aluminum
Housing Material	Galvanized Steel (SGCC)
Bearing Type	Ball Bearing
Insulation Class	Class F
Operating Temperature	-25°C to +60°C

The dual-speed specification provides the versatility required for the film set application, enabling a single unit to produce both high-impact and subtle air movement effects with a simple wiring change.

Technical Documentation

The product image shows the standard LWCA-110 series cross-flow fan.

LWCA-110820SN-06-12 Dual-Speed Specification Sheet (.pdf)

Why LONGWELL for Film Set?

• Stable Airflow: LONGWELL cross-flow fans can provide consistent and uniform airflow for film set wind effect.
• Low Noise: When the LWCA-110820SN-06-12 is operating at its maximum speed, the noise it generates is 68 dBA. In noise-sensitive places like film sets, the industry-leading noise reduction technology of LONGWELL cross-flow fans is critical.
• Reliable Performance: In a continuous film shooting period, LWCA-110820SN-06-12 can maintain high performance. They are produced with premium materials and pass the rigorous testing.
• Customizable Solutions: For specified film set requirements, LONGWELL provides tailored solutions.  Adjustments to dimensions, airflow output, mounting style, and noise levels are available.
• Global Technical Support & Service: LONGWELL provides comprehensive support worldwide.

Explore our full Cross-Flow Fans range.

Frequently Asked Questions

Q: How is the two-speed function on the LWCA-110820SN-06-12 controlled?

A: The fan’s two-speed capability comes from a tapped motor winding with separate lead wires. Control is managed externally, typically with a simple SPDT (Single Pole, Double Throw) switch. The detailed design can be found in the technical documentation.

Q: What is the lead time for a custom AC fan order like this?

A: LWCA-110820SN-06-12 uses a customized motor winding. The lead time of this kind of modification typically needs a lead time of 15-30 days.

Q: Can this cross-flow fan be supplied with a fully variable speed EC motor?

A: Yes. This project used a two-speed AC motor for simplicity. LONGWELL has SmartEC™ motor technology, providing the same factor as an AC motor.

Q: What materials are used and what is the expected operational life?

A: The LWCA-110820SN-06-12 is built for commercial use, featuring a lightweight, corrosion-resistant aluminum impeller and a robust galvanized steel housing. It is equipped with high-quality ball bearings designed for an L10 operational life of over 40,000 hours at a 40°C ambient temperature.

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Project Item: 7030460316-AC
Project Date: 2026-06-27 05:49:39