Can I buy samples by placing an order?

Yes. Please feel free to contact us to arrange sample orders.

How can I get a price?

We usually quote within 24 hours after receiving your inquiry (except weekends and holidays). For urgent requests, please send an email or contact us by other means for a quick quote.

4 Inch Axial Mixed Flow Inline Ventilation Circular Duct Fan

Name: 4 Inch Axial Mixed Flow Inline Ventilation Circular Duct Fan
Brand: Ningbo Biote Mechanical Electrical Co., Ltd.
SKU: 2183810155

Zhejiang, ChinaNingbo Biote Mechanical Electrical Co., Ltd.

US$13.00

50-499 Pieces

US$12.00

500-999 Pieces

US$11.00

1,000+ Pieces

Sample price:US$50.00/piece.Request sample

Product profile

Customization

Available

Material

Plastic

Usage

for Experiment, for Air Conditioner, for Manufacture

Model NO.

BF-4-100

Flow Direction

Mixed Flow

Pressure

Low Pressure

Certification

RoHS, UR, ISO, CE, CCC

Product Name

Inline Duct Fan

Keywords

Ventilation Fan

Model

Bf-4-100

Air Flow

2.5-49 M3/Min

Voltage(V)

220

Frequency(Hz)

Power(W)

35-280

Noisedb (a)

</=45-</=80

Pressure(PA)

111-630

Length (a)

220-360mm

Width(B)

140-450mm

Calibe(C)

70(-/+2)-320(-/+2)mm

Quantity(Carton)

1-6

Package Size(Cm)

58*27*38-46*37*36

Price

10.4-51.8

Transport Package

Standard Packaging or Customized

Specification

Standard specifications or customized

Trademark

BIOTE FAN

Origin

Ningbo, China

HS Code

8414593000

Production Capacity

5000000pieces/Year

Key features

Versatile Airflow Management: Supports both exhaust and intake functions for efficient indoor air circulation.

Wide Power Range: Available in 35W to 280W models to suit residential and industrial needs.

Multiple Certifications: Complies with RoHS, UR, ISO, CE, and CCC standards for global safety.

Compact Duct Design: Inline circular design fits standard ducts with lengths from 220mm to 450mm.

High Airflow Capacity: Delivers up to 49 M3/Min airflow for effective ventilation in large spaces.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceIn-stock Capacity

Ningbo Biote Mechanical Electrical Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2006-05-08Nearest Port: NINGBO, SHANGHAIAverage Response Time: ≤1.48hTerms of Payment: LC, T/TInternational Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DDP, DAP

AI-Powered supplier vetting

SummaryNingbo Biote Mechanical Electrical Co., Ltd. is a China-based limited trading company established in 2007, with six employees and products covering fan and motor machinery. It reports OEM/ODM capability, recent new-product development, minor customization, substantial export activity, and experience serving residential and commercial applications. Production information lists high output for duct fans and exhaust fans, plus HVLS ceiling fans, with peak-season fulfillment within 15 workdays and exports to multiple regions. However, the available evidence identifies no SDK, no overseas showroom or branch/agent network, and no documented procedures for supplier service assessment, corrective actions, or complaint handling. Certification status, customer case references, and several sustainability and traceability controls are not provided or remain unknown. Financial records are referenced for 2021–2023, but no non-monetary evidence in the slices establishes financial strength.

Supplier typeThe supplier is identified as Ningbo Biote Mechanical Electrical Co., Ltd., a China-based limited company classified as a trading company. Its stated product scope includes fan machines and motor machines, and it is not part of a larger company group.

R&D capabilityThe supplier reports new product development during the past year and provides ODM and OEM services. It has no available SDK, so the evidence supports product and design activity but not SDK-based development capability.

Production capacityThe supplier reports output of 10,000,000 duct fans, 10,000 HVLS ceiling fans, and 10,000,000 exhaust fans, with peak-season order fulfillment within 15 workdays. It also has 6–10 quality-control staff and exports to South America, Europe, Australia, and North America, although the company-wide employee count is six and the reported production figures are not independently clarified.

Customization capabilityThe supplier explicitly offers OEM/ODM services and states that solutions can be customized to client requirements. Its design-services capability is classified as minor customization, indicating customization is available but limited in scope.

Product Q&A

Q:How powerful are duct fans?

Duct fans range in power from less than 100W to more than 1,000W. A 1,000-watt fan is suitable for residential use, while 1,000W to 2,000W is suitable for industrial settings.

Q:Do duct fans increase static pressure?

Yes, duct fans can increase static pressure, which is essential to enable air to move through the duct system, especially when there is friction resistance and external factors that may impede airflow.

Q:Can duct fans reduce static pressure?

While duct fans are primarily used to increase static pressure, they can also reduce static pressure. This usually happens when the fan is set to a lower speed, when the fan is not sized properly for the system, or there is a leak within the duct system.

Q:How noisy are duct fans?

The sound level varies by size and design, typically ranging between 3.6 and 7.0 sound levels. 3.6 is comparable to a refrigerator, while 7.0 is similar to a busy office. Ducted fans are installed inside the duct system to avoid interference.

Q:How do you maintain long-term business relationships?

We maintain good quality and competitive prices to ensure customer benefits. We respect every customer, regard them as friends, and sincerely do business to build lasting relationships.