Four Values That Define the Fan Direction
The model comes later. First define the application, airflow, pressure and medium condition.
Application
Workshop ventilation, dust collection, boiler draft, tunnel ventilation, chemical exhaust or process air.
Airflow
Required air volume in m³/h, based on process demand, hood size, room volume or existing equipment.
Pressure
Static or total pressure after duct, elbow, damper, collector and filter resistance are included.
Medium
Clean air, dust, hot gas, acid mist, humid gas or flammable gas determine the construction direction.
From Site Information to Final Quotation
Use this sequence to organize the inquiry. Complete information helps QIYUE FAN check the preliminary fan direction faster.
Describe the Site
Tell us where the fan will be used, what process it serves and what problem it needs to solve.
Send Key Data
Airflow, pressure, temperature, medium, duct layout and operating time are the core selection data.
Match Fan Type
Review whether a centrifugal, axial, boiler, dust collection, mine or corrosion-resistant fan is suitable.
Confirm Quotation
After the technical direction is clear, confirm model, motor, material, drive, outlet direction, quantity and delivery requirements.
Calculate the Operating Point Before Selecting the Model
Use these guides to confirm airflow, pressure definition, performance curve, power, rotational speed, drive arrangement and outlet direction.
Airflow and Pressure
Understand air volume, system resistance and the fan operating point.
Read Guide →Fan Power Calculation
Estimate shaft and motor power after airflow and pressure are confirmed.
Calculate →From Capture Airflow to the Final Dust Collection Fan
Follow the complete system route: define the application, calculate airflow, add collector resistance, compare fan categories and then review the industry-specific working condition.
Information Required for Fan Selection
Start from the Information You Already Have
QIYUE FAN can review the possible direction before detailed confirmation.
Start with the Evidence You Already Have
Complete original data is helpful, but it is not always available. Use the evidence from the existing fan to begin the replacement review, then confirm operating duty and installation interfaces before final selection.
Complete Replacement Review →Common Applications and Fan Direction
This table is a preliminary reference. Final selection still depends on the real operating point and working condition.
| Application | What to Check | Fan Direction | Related Page |
|---|---|---|---|
| Workshop Ventilation | Large airflow and general air exchange. | Axial Flow Fan / Centrifugal Fan | Workshop Ventilation |
| Dust Collection | Capture airflow, duct resistance, filter resistance and dust characteristics. | Dust Collection Fan / High-Pressure Fan | Dust Collection |
| Boiler Draft | Hot gas, flue gas and continuous operation. | Boiler Induced Draft Fan | Boiler Draft |
| Mine / Tunnel Ventilation | Long-distance ventilation, confined space and site safety. | Mine Tunnel Fan / Axial Fan | Tunnel Ventilation |
| Corrosive Exhaust | Acid mist, humidity and material compatibility. | FRP / Corrosion-Resistant Fan | Chemical Exhaust |
| Pneumatic Conveying | High pressure and conveying-system resistance. | High-Pressure Centrifugal Fan | Pneumatic Conveying |
Send These Details for Fan Selection
This format helps reduce repeated communication and makes the selection process faster.
Send Selection Details →Continue from the Working Condition to the Product Direction
After the working condition is clear, check the suitable product category and model direction.
Send Your Working Conditions and Existing Fan Information
Application | Airflow | Pressure | Temperature | Medium | Duct Layout | Power Supply | Quantity