Silent Mixed Flow Inline Duct Fan | Low-Noise Ventilation

Product overview

Start with the published HF model data

Compare the published airflow, static pressure, noise and size rows for HF-100/125, HF-150 and HF-200 before reviewing the duct route and installation conditions.

Use case
Ducted ventilation and air movement projects.

Selection factor
Match airflow, duct resistance and installation space.

Buyer value
Send route details so the model can be checked correctly.

Technical Parameter


Model	Voltage (V)	Frequency (Hz)	Input Current (A)	Power (W)	Rotation Speed (rpm)	Volume Flow (m³/h)	Static Pressure (Pa)	Noise dB(A)	Size	Next step
HF-100/125	220	50	0.13	45	2550	310	300	30	L460°W200°H220mm	Ask about this model
HF-150	220	50	0.13	75	2550	540	300	45	L500°W250°H260mm	Ask about this model
HF-200	220	50	0.14	130	2500	1200	300	55	L560°W260°H310mm	Ask about this model

Two different HF duct-fan lines share this prefix

The published catalogue documents two distinct families, and both use model names starting with “HF”:

Pipeline silent (mixed-flow) duct fan — the HF-100/125 / HF-150 / HF-200 table above.
Diagonal booster duct fan — HF-75, HF-100 and HF-125.

Model names appearing in both lines (for example HF-100 and HF-150) carry different published airflow, static pressure and noise figures. Confirm which line your project specifies, and the matching datasheet, before ordering.

Silent Mixed Flow Inline Duct Fan Selection Notes

Related Linggong ventilation products

Sound level by model (published data)

Noise is often the deciding factor for a low noise mixed flow fan. The published Noise dB(A) column in the model table above gives a direct comparison: HF-100/125 is rated at 30 dB(A), HF-150 at 45 dB(A) and HF-200 at 55 dB(A). All three are measured at the same conditions shown in that table.

Read the table by airflow instead of by model number where possible. Higher airflow and static pressure generally mean more sound, so choosing the smallest model that still meets the required airflow and static pressure is the most effective way to keep a mixed flow inline duct fan quiet. If the duty point sits near the top of a model range, moving one size up and running it further from its maximum can also reduce perceived noise.

For duct systems where sound is critical, compare this series with a super quiet centrifugal duct fan or review the silent duct fan options before fixing the model.

Silent duct fan, low noise ducted fan or quiet inline duct fan?

Buyers reach this series under several names: a silent mixed flow inline duct fan, a silent inline duct fan, a low noise ducted fan, a quiet inline duct fan, or simply a silent duct fan. They describe the same requirement — a fan mounted in the duct line whose published sound figure is low enough for the space it serves. The published Noise dB(A) column above is the figure that matters, because it is given per model and per operating gear rather than as a family average.

Where a duct run passes a bedroom, office or meeting room, select the model by its low-speed sound figure first and its airflow second. If two models meet the airflow target, the one with the lower published low-speed figure is the quieter installation. For higher-pressure duct routes where sound is less critical, the mixed flow inline fan range covers the same format with a wider pressure spread.

Frequently Asked Questions

What is a silent mixed flow inline duct fan best for?

It is best for duct systems that need more pressure than a basic axial fan but quieter operation than many industrial centrifugal fans.

Is a mixed flow fan different from an oblique-flow duct fan?

Yes. Both can work in ducts, but mixed-flow fans combine axial and centrifugal airflow characteristics, while HF oblique-flow models are specified by duct size and pressure class.

How quiet is a low noise mixed flow fan?

Published sound levels for this series are 30 dB(A) for HF-100/125, 45 dB(A) for HF-150 and 55 dB(A) for HF-200. Because airflow rises with the larger models, the quietest choice is usually the smallest model that still meets the required airflow and static pressure.

Where should I link from this page for model selection?

Use the related HF and centrifugal duct fan pages below to compare duct diameter, airflow and static pressure before selecting a model.

Download product catalog PDF

Download the English product catalog PDF for Silent Mixed Flow Inline Duct Fan | High Pressure Quiet Ventilation. Use it for model comparison, technical review and inquiry preparation.

Download catalog PDF

Use the exact model, voltage and installation conditions for project selection.

Core Engineering Features

Start with the published HF model data set against the published values on this page. Every point below is taken from this model’s own data.

Voltage (V)220

Frequency (Hz)50

Input Current (A)0.13

Power (W)45

Rotation Speed (rpm)2550

Volume Flow (m³/h)310

Quality Assurance & Warranty

Fan orders are checked at the factory before shipping, because published airflow and pressure only hold if the delivered unit matches its table row.

Applied to this model: Voltage (V) 220, Frequency (Hz) 50. These checks are run against that specification before the unit ships.

Airflow and pressure checkChecks cover motor start-up, impeller balance, airflow and static pressure verification, noise review and model-to-table parameter matching.

Documented complianceCE, RoHS and related files cover the listed fan families; see the documents section below.

Warranty supportWarranty for fan orders is confirmed with the quotation for your destination market.

Service parts for fansImpellers, motor capacitors, mounting brackets and common service items.

OEM/ODM & Supply Options

For distributors and contractors working on ventilation projects, the supply side adapts to your market instead of one fixed fan build.

For this model (Voltage (V) 220, Frequency (Hz) 50), the OEM route can start from that base specification rather than a blank sheet.

OEM/ODMBadging, packaging and control options for fan orders, including branded cartons and manual inserts.

Airflow and pressure variantsModel selection, motor power and voltage options are reviewed against your duct calculation.

Voltage & plug optionsVoltage and plug configuration for this product line can be reviewed during quotation.

Documentation & bulk supplyCatalogues, technical sheets, available certificates, volume pricing and distributor programs for this product line.

Order quantity & lead timeMinimum order quantity, sampling and production lead time are confirmed per model and order volume — see the B2B supply page for how sourcing enquiries are handled.

QUOTE ROUTE

Request a quote for this fan

Send the target model or airflow, duct details, voltage, quantity and project country. We will confirm the suitable version and provide the required technical documents.

Target model or required airflow
Duct diameter, route and resistance
Voltage, frequency and quantity
Country, application and required documents

Silent Mixed Flow Inline Duct Fan | High Pressure Quiet Ventilation