- High back pressure and low noise
- Ultra-high ventilation
- Power saving DC – DC motor
- Multiple safety design
- The max. air flow is measured in free air; max air pressure is measured at zero air flow.
- Noise is measured in semi-anechoic chamber in free air, one meter from intake, right and left side. 3 microphones to average.
- All readings are typical values at rated voltage.
Mounting opening :320x320mm Single Speed (CMH 530/ CFM 311) The max. air flow is measured in free air; max air pressure is measured at zero air flow. Noise is measured in semi-anechoic chamber in free air, one meter from intake, right and left side. 3 microphones to average. All readings are typical values at rated voltage.













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