The air supply units from the GFR line with built-in filters are designed for the intake of outdoor air, ensuring a healthier indoor environment, free from impurities. Equipped with G4/M5 class filters, these units comply with the NBR 16401-3 standard, providing a high level of filtration and air quality.
Constructed with low-profile galvanized steel, they include mounting brackets and allow for horizontal or vertical installation, easily adapting to different spaces.
About the Product

Main Features:
✲ Integrated flat G4 and pleated M5 filters, complying with NBR 16401-3 for improved air quality
✲ Internal motor with direct drive to Siroco rotor, eliminating the need for belts and pulleys
✲ Quick-access panel, allowing easy filter replacement and motor cleaning
✲ Low noise level and vibration-free operation, ensuring greater comfort in the environment
✲ Integrated thermal protector to prevent motor overheating by automatically shutting down the unit
✲ Extended working temperature range: Resistant to temperature variations from -40°C to +65°C
✲ Compact galvanized steel structure with brackets for secure installation
Available Models:
🔹 GFR 230 – Three speeds | Single-phase Voltage
🔹 GFR 280 – One speed | 380V Single-phase Voltage
Technical Specifications
Specifications for 230V/60Hz for model 230 and 380V/60Hz for model 280.
Sound pressure level measured at 3 meters in free field, with ducts on intake and discharge sides.
| Model | Speed | Maximum Flow Rate [m³/h] | Maximum Pressure [mmwc] | Sound Pressure Level [dBA] | Frequency [Hz] | Motor Power [W] | Total Power Absorbed [W] | Voltage Type | Voltage [V] | Dimension of intake port [mm] | Outlet mouth dimension [mm] |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 230 | High | 2050 | 44 | 60 | 60 | 450 | 734 | Single phase | 230 | 550×330 | 300×260 |
| Medium | 1530 | 36 | 57 | 465 | Single phase | 230 | |||||
| Low | 1190 | 31 | 55 | 330 | Single phase | 230 | |||||
| 280 | 1660 | 3610 | 62 | 64 | 60 | 800 | 839 | Single phase | 230 | 682×492 | 302×236 |
*Sound pressure level, measured at 3 m in a free field, with ducts on both suction and discharge sides.

Models
230
280

| MODEL | Dimensions (mm) | Weight (Kg) | ||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | ||
| 230 | 604 | 725 | 422 | 774 | 670 | 35 |
| 280 | 760 | 820 | 551 | 896 | 825 | 57 |
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FAQ
It is essential to properly size the supply fan according to the room’s dimensions (volume and shape), following the technical recommendations of standard NBR 16401-2008.
A good supply fan should always provide better air quality, meeting the specific needs of your space. If you’re not sure which product is best for you, you can get in touch with one of our specialists. We have a qualified team with the technical expertise to help you make the best choice.




