Yes. Sample orders are welcome. Please contact us for model selection and shipping details.

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Air Systems Silent Quiet 4 Inch Duct Inline Exhaust Fan

Name: Air Systems Silent Quiet 4 Inch Duct Inline Exhaust Fan
Brand: Ningbo Biote Mechanical Electrical Co., Ltd.
SKU: 2255472065

Zhejiang, ChinaNingbo Biote Mechanical Electrical Co., Ltd.

US$23.80

50-499 Pieces

US$22.40

500-999 Pieces

US$21.90

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.

DF100

Flow Direction

Mixed Flow

Pressure

Medium Pressure

Certification

RoHS, UR, ISO, CE, CCC

Product Name

Ec Inline Duct Fan

Keywords

Ventilation Fan

Model

Df100

Air Flow

190cfm

Voltage(V)

110-240

Frequency(Hz)

50/60

Power(W)

Noisedb (a)

</=28

Pressure(PA)

227

Length (a)

303mm

Width(B)

214mm

Calibe(C)

97(-/+2)mm

Package Size(Cm)

33X24X21

Price

21.9-23.8

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

High Energy Efficiency: EC motors deliver higher efficiency with lower power consumption compared to traditional fans.

Ultra-Quiet Operation: Noise levels range from 25 to 60 dB, suitable for offices and residential spaces.

Versatile Applications: Ideal for exhaust and supply functions in industrial plants, warehouses, and commercial spaces.

Precise Speed Control: EC motor technology allows for accurate adjustment of airflow and pressure.

Multiple Certifications: Certified by RoHS, UR, ISO, CE, and CCC for global compliance and safety.

Stable Airflow Delivery: Axial impeller structure ensures straight airflow for high volume in low pressure areas.

Wide Voltage Range: Compatible with 110-240V voltage and 50/60Hz frequency for global use.

Sample Orders Available: Sample orders are welcome with professional model selection and shipping support.

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: ≤1.54hTerms 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 your EC duct fans?

Our EC duct fans come in a wide power range from 50W to 1,000W+, suitable for different ventilation systems. 100-300W: Home & small commercial spaces 300-800W: General duct ventilation / equipment cooling 800W+: Industrial high-airflow applications EC motors deliver higher efficiency at lower power consumption.

Q:Do EC duct fans increase static pressure?

Yes. EC duct fans are designed to boost static pressure effectively, ensuring strong airflow even in long ducts or systems with high resistance. Their high-efficiency EC motors provide stable and reliable pressure performance.

Q:Can an EC duct fan reduce static pressure?

Static pressure may decrease if: The fan speed is set too low The fan size is not properly matched to the duct system There is air leakage or blockage in the duct Correct sizing + EC motor speed control ensures optimal static pressure.

Q:How noisy are EC duct fans?

EC duct fans operate very quietly, typically within 25-60 dB: 25-35 dB: Similar to a quiet refrigerator 40-55 dB: Similar to office ambient noise As they are installed inside ducts, noise transmission is further reduced. If noise increases, check for leaks, blockage, or loose installation.

Q:How do you ensure long-term cooperation?

We offer stable quality, high-efficiency EC technology, and competitive prices. We value every customer, provide professional service, and aim for long-term win-win partnerships.