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VFD for fans: precise airflow control and lower operating costs
Frequency drives for fans are used in HVAC, smoke extraction and industrial ventilation to control motor speed according to actual demand. Fan loads follow the affinity law, so speed reduction provides significant energy savings.
Related categories: vector VFD, scalar VFD, 1 phase 220V, 3 phase 380V.
How to choose a VFD for a fan
Main criteria: VFD output current must be equal or higher than motor rated current, 10-15 percent headroom, correct supply voltage, PID support, analog inputs and Modbus for BMS integration.
| Model | Power | Supply | Use case |
|---|---|---|---|
| Veichi AC10-T/S2-R75G-B-VC | 0.75 kW | 1x220 | small ventilation systems |
| Delta VFD007EL21A | 0.75 kW | 1x220 | duct fans |
| Veichi AC10-T3-1R5G-B | 1.5 kW | 3x380 | air handling units |
| Veichi AC10-T3-2R2G-B | 2.2 kW | 3x380 | industrial ventilation |
| Veichi AC10-T3-5R5G-B | 5.5 kW | 3x380 | high capacity fan systems |
Popular brands for fan applications
Most common options are Veichi and Delta Electronics. For advanced HVAC projects, Schneider Electric and Danfoss are also used.
Selection by key specs
Quick links: 2.2 kW, 3 kW, 5.5 kW, 7.5 kW, 11 kW.
FAQ
Is scalar mode acceptable for fan loads?
Yes, in most fan applications where high low speed torque is not required.
How to reduce fan noise with a VFD?
Set proper minimum frequency, acceleration time and PWM carrier frequency.
When is PID needed?
When static pressure or airflow must be controlled by sensor feedback.
Warranty and support
We provide sizing assistance, commissioning support and technical consulting. Delivery across Ukraine and official warranty.
