1-Pole vs 2-Pole vs 4-Pole Fans: What's the Difference and Which One Do You Need?
Learn the difference between 1-pole, 2-pole, and 4-pole fans, including motor speed, torque, noise, lifespan, and how to choose the right fan for your application.
Fantech
Fantech Minitube Duct Mounted Axial Fan 300MM (12" Inch) - MTS306 | 6 Pole | Steel Housing
Power Consumption 50W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 300MM (12" Inch) - MTS304 | 4 Pole | Steel Housing
Power Consumption 90W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 300MM (12" Inch) - MTS302 | 2 Pole | Steel Housing
Power Consumption 180W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 250MM (10" Inch) - MTS254 | 4 Pole | Steel Housing
Power Consumption 60W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 250MM (10" Inch) - MTS252 | 2 Pole | Steel Housing
Power Consumption 110W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 200MM (8" Inch) - MTS204 | 4 Pole | Steel Housing
Power Consumption 30W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 200MM (8" Inch) - MTS202 | 2 Pole | Steel Housing
Fantech
Fantech Minitube Duct Mounted Axial Fan 300MM (12" Inch) - MTP306 | 6 Pole | Plastic Housing
Power Consumption 50W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 300MM (12" Inch) - MTP304 | 4 Pole | Plastic Housing
Power Consumption 90W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 300MM (12" Inch) - MTP302 | 2 Pole | Plastic Housing
Power Consumption 180W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 250MM (10" Inch) - MTP254 | 4 Pole | Plastic Housing
Power Consumption 60W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 250MM (10" Inch) - MTP252 | 2 Pole | Plastic Housing
Power Consumption 110W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 200MM (8" Inch) - MTP204 | 4 Phase | Plastic Housing
Power Consumption 30W | IP44
Fantech
Fantech Minitube Duct Mounted Axial Fan 200MM (8" Inch) - MTP202 | 2 Pole | Plastic Housing
Power Consumption 70W | IP44
Ventair
Ventair Momentum Inline DC Exhaust Fan - Inline 150 | 150MM (6" Inch) | w/ 10 Minute Run-On Timer
Ventair
Air Flow 240 M³/H | Power Consumption 28W | IPX4
Ventair
Ventair Momentum Inline DC Exhaust Fan - Inline 100 | 100MM (4" Inch) | w/ 10 Minute Run-On Timer
Blauberg
Blauberg Primo 355 Mixed Flow Inline EC Fan - 355MM (14" Inch) | 3685 M3/H | IPX4
Air Flow 3685 M³/H | Power Consumption 352W | IPX4
Blauberg
Blauberg Primo 400 Mixed Flow Inline EC Fan - 400MM (16" Inch) | Metal Casing
Air Flow 5700 M³/H | Power Consumption 726W | IPX4
Blauberg
Blauberg Primo 400 Mixed Flow Inline AC Fan - 400MM (16" Inch) | 3 Speed
Air Flow 3550 M³/H | Power Consumption 224W | IPX4
Blauberg
Blauberg Primo 355 Mixed Flow Inline AC Fan - 355MM (14" Inch) | 3 Speed
Air Flow 2485 M³/H | Power Consumption 150W | IPX4
AC Infinity
AC Infinity Inline EC Exhaust Fan Cloudline Pro T12 - 300MM (12" Inch)
Air Flow 2725 M³/H | Power Consumption 250W | IP44
Fantech
Fantech Minitube In-line Duct Mounted Fan - 150MM (6" Inch)
Air Flow 310 M³/H | Power Consumption 28W | IP44
Vivosun
Vivosun AeroZesh S4 Inline EC Fan - 100MM (4 Inch) w/ GrowHub E42A WiFi Controller
Air Flow 354 M³/H | Power Consumption 20W
Vortice
Vortice Lineo Inline Mixed Flow EC Fan - Lineo 315 ES | 315MM (12" Inch)
Air Flow 2625 M³/H | Power Consumption 230W | IP45
Vortice
Vortice Lineo Inline Mixed Flow EC Fan - Lineo 200 ES | 200MM (8" Inch)
Air Flow 1100 M³/H | Power Consumption 90W | IP45
Vortice
Vortice Lineo Inline Mixed Flow EC Fan - Lineo 250 ES | 250MM (10" Inch)
Air Flow 1475 M³/H | Power Consumption 126W | IP45
Vortice
Vortice Lineo Inline Mixed Flow EC Fan - Lineo 100 ES | 100MM (4" Inch)
Air Flow 305 M³/H | Power Consumption 20W | IP45
Measure your room (Length × Width × Height) to get the volume, then multiply by the air changes per hour (ACH) you need: Airflow (m³/h) = Room volume × ACH. Bathrooms usually need 10–20 ACH, laundries and kitchens 15–30 ACH, and grow tents even higher.
Air exchange (air changes per hour) is how many times the full room volume is replaced each hour. It’s critical for removing steam, smells and humidity, and for preventing mould and condensation.
AC fans use a traditional AC motor, are cheaper and simple to run. EC fans use a high-efficiency brushless EC motor with electronics, are quieter, more efficient, and allow much finer speed control.
Use only controllers made for AC motors, such as step/transformer controllers, specific AC speed controllers, or the built-in 2-speed function (if provided). The wrong controller can cause noise, poor performance or motor damage.
EC fans are best paired with 0–10V, PWM or dedicated EC/smart controllers. These give smooth, stepless speed control and often allow temperature, humidity or timer-based automation.
Choose AC if you want a budget-friendly fan with simple on/off or 2-speed control. Choose EC if you want top efficiency, quiet operation and precise or smart control, especially for 24/7 or climate-critical applications.
Yes. Long duct runs, tight bends, small duct sizes and filters all reduce airflow. Match the duct size to the fan, keep runs as short and straight as possible, and minimise sharp bends.
Yes, a correctly sized inline fan can exhaust from two or more rooms using junctions (Y/T pieces). Ensure the total room volume and required ACH match the fan capacity, and use dampers to balance airflow.
Most inline fans sit in the roof space or ceiling void, connected to an intake grille inside and ducted to an external vent. The air should always be discharged outside, not into the roof cavity.
Look for insulated or mixed-flow models, check the dBA noise rating, and consider an EC fan so you can run it at lower speeds. Using flexible connectors and anti-vibration mounts also helps reduce noise.