ATZAF FF (Double width double inlet airfoil housed fan) 

All the ATZAF FEATURES plus:

• Galvanized inlet cone with Forefinger (patented)
• Trapezoidal cut-off                       

All the ATZAF BENEFITS plus:

• Increased airflow and pressure: for a required volume and pressure the fan can run at lower rpm or can be selected smaller
• More uniform flow at the fan outlet for improved filter and coil efficiency
• Wider working range with high efficiency
• Significant reduction of noise, especially in the low frequencies