What certifications does the fan have?

CE, RoHS and CCC on applicable models; ETL on selected models. Tell us your destination market and we will confirm the certificate for the exact model before you order.

What is the noise level of this centrifugal fan?

The listed sound level is 77 dBA at 1900 RPM. Actual noise depends on the operating point and installation; we confirm the noise data for your exact model.

355mm Ec High Efficiency Energy Saving Backward Centrifugal Fan

Name: 355mm Ec High Efficiency Energy Saving Backward Centrifugal Fan
Brand: NINGBO LONGWELL ELECTRIC TECHNOLOGY CO., LTD.
SKU: 2039208665

Zhejiang, ChinaNINGBO LONGWELL ELECTRIC TECHNOLOGY CO., LTD.

US$209.00-248.00

100 Pieces

Sample price:US$323.00/piece.Request sample

Product profile

Customization

Available

Material

Aluminum Fan

Blade Material

Aluminum Alloy

Type

Centrifugal Fan

Electric Current Type

Mounting

Duct Fan

Certification

RoHS, CE, CCC

Transport Package

Standard Exporting Packages

Trademark

LONGWELL

Origin

China

Production Capacity

30000 PCS / Month

Key features

High Efficiency EC Motor: BLEC motor with permanent magnet rotor for up to 1:10 optimized commutation and no slip loss.

Sound Level: 77 dBA at 1900 RPM per product data; actual level depends on operating point and installation.

Compact Design: Extremely compact 355mm backward centrifugal fan with impeller directly mounted on motor rotor.

Advanced Protection: Features locked-rotor, reverse polarity, over-voltage, and soft start protection for safety.

Flexible Control: Supports 0~10VDC and PWM control inputs for precise speed and airflow management.

Durable Construction: Aluminum alloy blades and propylene impeller with glass-fiber for robust performance.

Certifications: CE, RoHS and CCC on applicable models; ETL on selected models; we confirm the certificate for your exact model and market before order.

Company profile

Cooperated with Fortune 500Self-brandedExhibition ExperienceManagement Certification

NINGBO LONGWELL ELECTRIC TECHNOLOGY CO., LTD.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 6 Years CertifiedNearest Port: Ningbo PortAverage Response Time: ≤1.40h

AI-Powered supplier vetting

SummaryThe supplier is a China-based HVACR manufacturer offering OEM/ODM services, product customization, and stated 24/7 after-sales support. It reports annual production capacity for cross-flow, centrifugal, and axial fans, supported by cutting, laser-cutting, bending, rolling, and punching equipment. The supplier holds product, management-system, and social-responsibility certifications, and reports overseas service resources including an overseas warehouse, showroom, agents or branches, and participation in the Climate World trade show. Evidence of innovation is positive through recent new-product development and ODM services. Customer references are also favorable, including cooperation with Fortune 500 companies and an 80%–100% repeat-buyer preference. However, service-management procedures lack supporting records, and no approved supplier list is maintained. Financial information is insufficient to assess credibility because the slices provide only reporting years, not financial performance values.

Supplier typeThe supplier operates from Zhejiang, China, and its stated business scope covers manufacturing and processing of hardware tools, electronic components, plastic products, and mechanical and electrical equipment, along with technology R&D, design, and sales. Its company overview specifically positions it as an HVACR OEM/ODM solution provider.

CertificationsThe supplier reports FCC, CE, RoHS, and other product certifications, ISO9001:2015, ISO45001:2018, and ISO14001 management-system certifications, plus BSCI social-responsibility certification. These certifications provide explicit evidence of compliance and management-system coverage.

After-Sales capabilityThe supplier states that it provides 24/7 after-sales service and offers overseas debugging, maintenance, repair, training, and equipment installation in Russia. It also reports an overseas warehouse, showroom, agents or branches, and trade-show participation; however, the slices do not verify service performance outcomes.

R&D capabilityThe supplier reports new products during the past year, provides ODM services, and lists technology research and development, technical consulting, technology transfer, and design within its business scope. It does not provide an SDK, but that limitation is not sufficient to negate the broader evidence of product and technical R&D capability.

Production capacityReported annual productivity is 200,000 cross-flow fans, 300,000 centrifugal fans, and 200,000 axial fans. The supplier also lists cutting, laser-cutting, bending, rolling-and-bending, and punching equipment, supporting a demonstrated manufacturing base.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. These services are reported both as an R&D/design capability and as a general design-services capability.

Client casesThe supplier reports providing OEM services for well-known brands and having cooperated with Fortune 500 companies. It also reports an 80%–100% repeat-buyer preference, although no customer names, project details, or independently verifiable case records are provided.

Product Q&A

Q:What is the motor type and efficiency feature?

It uses a BLEC (Brushless EC) motor with a permanent magnet rotor, offering high efficiency, low copper/iron loss, and synchronous operation without slip loss.

Q:What are the control options for this fan?

The fan supports control inputs of 0~10VDC and PWM, allowing for precise speed control and integration into automation systems.

Q:What safety protections are included?

The fan includes locked-rotor protection, reverse polarity protection, over-voltage protection, and soft start protection to ensure safe operation.

Q:Is customization available for this product?

Yes, OEM and ODM services are available. Customization options include samples, designs, full customization, minor customization, and flexible customization.

Q:What are the minimum order quantity and lead times?

The minimum order quantity is 100 pcs. Customized samples typically take 1-3 weeks, and first production batches 30-45 days after sample approval, depending on quantity and configuration.

Send Inquiry

*To:

NINGBO LONGWELL ELECTRIC TECHNOLOGY CO., LTD.

*Content:

0/4000

Supplier replies will be sent to your registered email

355mm Ec High Efficiency Energy Saving Backward Centrifugal Fan