Industrial Ventilation Upgrade: AC to EC Fan Conversion for Energy Savings
Industrial facilities operating 24/7 face consistent pressure to optimize energy consumption and reduce operational costs. Legacy AC ventilation systems, while robust, often represent a significant portion of an industrial plant’s energy footprint. The challenge lies in upgrading these systems to modern, energy-efficient alternatives without compromising critical airflow parameters.
Longwell addressed this precise requirement for a client needing an energy-saving overhaul of their production line ventilation. The existing setup utilized AC exhaust fans operating continuously for 7000-8000 hours annually.
Addressing Inefficient Legacy Systems
The client’s original system incorporated AC exhaust fans with the following specifications:
- Voltage: 380V
- Frequency: 50Hz
- Input Power: 250W
- Speed: 1400 rpm
- Airflow: 4500 m³/h
The primary objective for the upgrade was to achieve substantial energy savings through an EC fan replacement, while maintaining an equivalent airflow volume for effective production line air exchange.
Longwell’s EC Solution: LWEE500(20″)SP-405
Longwell proposed the LWEE500(20″)SP-405 EC exhaust fan as a direct, energy-efficient replacement. This model is engineered to provide robust performance in demanding industrial settings, offering a significant reduction in power consumption while maintaining critical airflow specifications.
Performance Analysis: AC vs. EC Efficiency
The transition from the legacy AC fan to the Longwell LWEE500(20″)SP-405 EC model delivers quantifiable energy savings, directly impacting the Total Cost of Ownership (TCO) for continuous operations.
| Parameter | Original AC Fan | Longwell LWEE500(20″)SP-405 EC Fan | Benefit |
|---|---|---|---|
| Voltage | 380V, 3-Phase | 380V, 3-Phase | Direct Compatibility |
| Frequency | 50Hz | 50/60Hz | Flexible Operation |
| Airflow | 4500 m³/h | 4500 m³/h | Maintained Performance |
| Speed | 1400 rpm | 1400 rpm | Equivalent Speed |
| Input Power | 250W | 200W | 20% Power Reduction |
| Life Expectancy | Not specified | 40,000 hours | Extended Reliability |
With a 50W power reduction per fan, an installation operating 7500 hours annually realizes a saving of 375 kWh per fan per year. This translates into substantial operational cost reductions and a lower carbon footprint over the system’s lifespan.
Engineered for Continuous Industrial Operation
The LWEE500(20″)SP-405 EC exhaust fan is built for longevity and consistent performance, critical for 24/7 industrial production environments. Its 40,000-hour life expectancy minimizes maintenance downtime and replacement cycles, further contributing to a lower TCO. The EC motor technology offers inherent advantages in energy efficiency, precise control capabilities, and reduced heat generation compared to traditional AC motors.
LWEE500(20″)SP-405 Technical Specifications
Below are the detailed technical specifications for the Longwell LWEE500(20″)SP-405 EC exhaust fan:
| Specification | Value |
|---|---|
| Model Number | LWEE500(20″)SP-405 |
| Type | EC Exhaust Fan |
| Voltage | 3~380V |
| Frequency | 50/60Hz |
| Rated Speed | 1400 r/min |
| Airflow | 4500 m³/h |
| Input Power | 200W |
| Dimensions (WxHxD) | 600mm x 600mm x 248.5mm |
| Life Expectancy | 40,000 hours |
For comprehensive technical documentation, refer to the Longwell LWEE500(20″)SP-405 data sheet.
Technical Documentation & Resources
Project Gallery & Technical Drawings
Project Item: 6948627599 – AC exhaust fan replaced with EC
Project Date: 2026-04-08 03:46:45
