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The fresh air unit has an independent exhaust and supply air system. Polluted air is exhausted to the outside through exhaust vents, exhaust ducts and exhaust fans, while fresh outdoor air is supplied to the room through supply fans, supply ducts and supply vents. It uses special materials to reduce noise, has a thickened outer layer and is processed in one piece to ensure corrosion resistance and structural stability.
| Technical Performance Table | ||||
| Model | Air volume(m³/h) | Power(W) | Static Pressure(Pa) | Noise Level dB(A) |
| XF-350M-C | 350 | 180 | 110 | 43 |
| XF-550M-C | 550 | 300 | 130 | 48 |
| XF-350M-X | 350 | 180 | 110 | 43 |
| XF-550M-X | 550 | 300 | 130 | 48 |
